It is a truth multi-versally acknowledged that 98% of comic book fandom is wonderful and lovely, and yet there also exists a very loud 2% that sucks so hard they almost ruin it for the rest of us. Usually it's pretty easy to tell which sive of the divide you sit on, but if you're ever unsure, DC Universe's animated Harley Quinn series has created the perfect Litmus test — the show released a new clip from its upcoming episode "Batman's Back Man", and if literally anything over these 44 seconds makes you mad off and/…