how do i know he/she pulled??? because i tell them they pull'd to their face and they either smile or something and never deny it because there is no punishment for it, but if you did put a punishment they would just say "lag sorry" or some other BS
as much as i'd like to see people punished for pulling, point is it's impossible to prove it and making people take screenshots is ridiculous, so pretty much all i can say is if you pull and people know you as being a constant puller they can just not bother fighting you and you can get your hero by killing lvl 120 scrubbies trying to level