I have used my real name online before. Funnily enough it leads to a lot of identity confusion due my name being pretty common and other people being called it or knowing someone else with the same name. If this sort of thing is required then I would probably adopt a fake but plausible sounding name or just not bother really.
I'm not an authoritarian person and am repulsed by any effort to make people declare their "real" identity, as if a name or number was who you really are. People have lots of perfectly valid reasons for going by another name. Maybe they are trying to have some time that they can keep away from a paranoid and abusive spouse. Maybe they are plagued by bullies at school and want to enjoy a fantasy game with strangers without being beaten up for being that fag who plays a night elf chick in a faggy role playing game.
I'm not an authoritarian person and am repulsed by any effort to make people declare their "real" identity, as if a name or number was who you really are. People have lots of perfectly valid reasons for going by another name. Maybe they are trying to have some time that they can keep away from a paranoid and abusive spouse. Maybe they are plagued by bullies at school and want to enjoy a fantasy game with strangers without being beaten up for being that fag who plays a night elf chick in a faggy role playing game.