Sure, helping offtank is one thing, running around like an idiot thinking you can do what you want is the issue tho. As a healer I have seen FAR to many people thinking they are a one man army. Im also getting irritated with the people using their most powerfull area of effect weapons after I and other group members crowed control things. Im going to just start letting those ******* die.
Thats what I do, when they complain about letting them die I just tell them I was healing the tank and the people who were not acting like idiots