This is terrible.
Only people who get upset over words on the internet and their own inability to ignore idiots would support this terrible terrible plan.
What happens if some kid is unpopular at school because they're a geek? They have to pay more for video games because all the cool kids at school voted them as an unpopular gamer? What if that kid was already poor and could barely afford games to begin with? Way to ensure he'll never get any enjoyment out of his pathetic childhood.
You think this will punish the griefers (who will all just vote each other up anyways) but all this is going to do is marginalize people who don't deserve it.