How to Avoid Scams in Runescape

There are many ways RuneScape players choose to scams Free Runescape account or trick other RuneScape players for personal gain. Such dishonest methods can range from extremely simple to entirely complex. You'll be surprised by how elaborate a scammer's scheme might be. Either way, you must keep an eye out for such dishonest pixel-lovers...
Steps

1.Watch the second trade screen closely before accepting. The January 2nd update makes this scam impossible. Because you cannot trade out of the 3k limit (for non-members) and up to 30k for members. Even Mithril is worth more then 3k, so as stated before this no longer applies.
2.Report any trim offers immediately. The January 2nd update makes this scam impossible. All Black, Adamant, and Rune armor are all worth more than 3k, so you cannot trade those items without having equal value. And keep in mind that NO ONE can trim armour in RuneScape. Not even the JMods themselves (unless they have it with them already via magic backpack ^_^)...
3.Know what the "true" value of items are when trading. The January 2nd update makes this scam impossible. Whenever you trade an item it now shows the value of the item.
4.Avoid any and all "trust trades". This may sound like a broken record, but now thanks to The January 2nd update, it makes this scam impossible. You cannot give anyone more then 3k so trust tests cannot be done.
5.Beware of suspicious jobs. Do not attempt to take the Wine of Zamorak for anyone, unless you kill all of the monks first. If they say that you shouldn't kill the monks, ask them why they don't get it themselves, then leave. Taking the Wine of Zamorak without killing the Monks causes you Hit Point damage, as well as resulting in all of the monks attacking you. Another pointer is to be wary of a player asking you to do an odd task with them when in the Ardougne area, or anywhere else that contains trapped chests for the purpose of Thieving. One scam around them is telling the player that if they click to open the chest enough times, it will glitch RuneScape and give them a valuable item. Actually, it will just cause you a lot of hitpoints damage due to the trap being triggered. Beware of Runescape players that cozy up to you, act really nice and do you a few small favors but then turn around and ask for something really big (like a Free Runescape Account party hat) just because they did a couple of little things for you while playing the game. Remember that all Runescape trades are not equal. You might feel guilty about not giving people anything in return, which is perfectly normal. But if what another Runescape player asks for is ridiculous, just tell them no. Period. If they bully you or keep demanding an unfair Runescape trade just remove them or block them. Besides, nowadays, think of the bright side: uneven trades are almost impossible thanks to the half-loved/half-hated Trade Limit update (from late 2007). Beware of players asking you to smelt limestone if you are low on health. Limestone can cause a moderate amount of damage when smelted, and can kill a low level/player low on health.
6.Keep your password to yourself! This cannot be stressed anymore than it is. Treat your password like a credit card or social security number! Even if it's a relative or friend right next to you, one action may change your account significantly. People may say things like "Jagex blocks you from saying your password" or "You can't say your password backwords!" All they are trying to do is get you to say your password out loud so they can log onto your accoutn and change your password. It's so easy to do it's unbelievable.
7.Do not ever go to the wilderness to trade. Don't even come close to the ditch with your valuable items and money. Some players may say they want to trade somewhere close to the north but they are actually trying lure you into the north so that NPCs can kill you. Remember, the wilderness is the only place that is NOT secure for trading and you are likely to be killed by the renevant ghosts.
Tips
Don't listen to anyone asking to follow them. Most likely, they'll lead you to the Wilderness & kill you. A suggestion is to tell them that you need to go to the bank first & see how they react. Keep an eye out for your surroundings, if you do decide to follow someone else. Be aware of where you are going at all times. You should never go into an area with another player that you know contains hostile and high leveled creatures such as the Kalphite Queen.
Before agreeing to a trade on the forums, ask the player where the trade is going to take place. Sometimes players offer good items for a low price... But want you to meet them in the middle of the Wilderness. If that is the case, you can report them on the Forum Emergencies sticky in the General Forum.
You may also want to add the player that you are trading with to the friend list so if they log out and you don't remember their name you can always copy it from your friend list.
Don’t give to people who say statements like "I’ve been hacked", "I just got killed", or "I'm poor and need more items". They're usually lying, it would encourage more begging and scamming to give them items.
There are no cheat codes for RuneScape, and there are no way to get access to any.
Try to learn the scams which exist so that you are protected from them. If you check How to Scam in Runescape you will know about, and be protected, from many scams.
For a complete article on viruses in Runescape, please read How to Avoid Keyloggers and Viruses in Runescape. This article will explain scams that occur outside of the actual game.
The January 2nd update allows you to see the market value, a calculator is no longer needed
Warnings
Do not abuse this guide! This guide is not meant to tell you to scam! Scamming is illegal and you can and will be banned for it!
If you do get angry at a scammer, simply ignore him/her, switch worlds, or politely tell them to go away. However, do not swear or use offensive language. This will result in you getting banned or muted in the game. Report the scammer quickly.
Also you can only get scammed up to 3k in nonmembers and 30k in members max if you ever read the rune knowlegde base forums