On the Something Awful forums, you can buy custom avatars for yourself or for others. Buying for yourself costs $5, for somebody else it's $10.

Multiple posters have purchased hateful / doxxing avatars for themselves in order to make themselves appear persecuted, so they could blame the purchases on their "forums enemies". In at least one case, though, they were too cheap to use the totally anonymous $10 buy-for-somebody-else option, so they bought the hate avatar on their own account and just hoped the admins wouldn't look at the logs.

Basically people make terrible decisions all the time in service of their obsession.