runescapeclassic
The main RuneScape Wiki has an article on: Scam
The Old School RuneScape Wiki also has an article on Scam.

A Scam in RSC is when a player tricks another player into giving the other player their possessions, one way or another, and later finding out that they have been fooled. The scammer usually has the intent of obtaining in-game wealth unfairly. Sometimes, the scammer wants to obtain the player's password. It is against the Jagex Rules, even though it is practiced in both RuneScape Classic and RuneScape 2. Scamming has become almost non-existent due to the measures taken by Jagex, yet it still persists.

Avoiding Scams

General