That case about the suicide you speak of happened in my RL friend's guild. He was the GM of the guild and they had noticed that one of the members was acting unusual. On vent he was going insane. So the Guild master sent a PM to the GM of the server and explained what was going on and that X had been talking about suicide on vent. The GM found his IP address and contacted the local police near the young man's house. They found him dead in his room from an overdose. My RL friend (the guildmaster) then had to be questioned by the police over the phone about the behavior of X. Thats realy all my friend could tell me. Oh, and they were on the realm Uldum in one of the top raiding guilds of Vanilla/TBC.
This stuff does happen IRL. If you srsly dont think what you do or say in a virtual game impacts someone IRL then you are mistaken. Some people may just be so fragile and at the point of breaking when you say the wrong thing or do the wrong thing in the game to them, unfortunately.