Fears? Seeing as a game cannot cause me any physical harm, and limited mental, I'd say more like apprehension.
1) Meeting someone who treats me badly, or says something that really, really hurts.
2) Being embarrassed/bullied/ganged-up on.
3) Those really literate RPs (You know what I'm talking about) owning me and being a bit smug about it.
I don't really fear anything on here. x3