It's not necessarily always being misused, just that others maybe have a different outlook on what they consider to be valuable or helpful information. There will always be misuse, but don't think it's a huge issue (at least at this stage anyway). I, as far as I know, have no friends or alt accounts on the forum, but have still managed to accrue some karma, albeit at a slowish rate. Doesn't really bother me either way, as long as I don't get negative karma, but it's good to know that at least some of my posts have added value.