Everyone is a potential scammer. You might be one and not know.
Ok, people scam on the internet because
1) its very easy
2) you dont see the effects you cause and,
3) Theres no concesquence.
Now, Lets say someone said, Can you transfer 10m, 100m, whatever, to my other account? how many of you would be holding that money and think, you know what, il think il keep it.
Im sure if I went to the most honest runescape player and said, here hold this for 2 seconds, im sure none of them would give it back.
Tho this is different when where talking real life money, it takes a bastard to do that.