Auto-logout exploit?

[Aenarion]

All big MMO's have this feature

Never mind the fact that the size of the game doesn't really matter in this topic, Eve Online, one of the larger subscription based MMO left, does not have a logout timer - in fact, afking is actually a valid resource-denial tactic in wars.

I see someone AFK, gonna report them.

Knock yourself out, ironically you will be the one doing actual harm to the game, by cluttering up a support system already stretched thin dealing with actual issues.