As a tank main, if someone accidently grabs agro, I will pull it off of them. I won't say anything. There's multiple reasons for accidents.
If they continuously "accidentally" agro mobs, I will ask them if they can stand a little farther back so I can get initial agro on the mobs.
If the continuously "accidentally" agro mobs after my request, I will let them take the agro and tank.
If they on-purpose pull for whatever reason, then I will let them tank.
Accidents are accidents. I usually have no problem with accidents. I have problem with purposes.









