Premades.
Sure, I'm alright with you making a 5-man pubstomp team.
Multi-man ganks? I'm fine with that.
No, I'm not okay with the toxicity and the repeated chants of "get rekt", "ez", etc. I don't care if making the other team tilt is your entire goddamn strategy; it's still toxic, and I can freely report you for it.
http://www.fengshuidana.com/wp-content/uploads/2014/09/sea_salt.jpg