I browse with showdead on because frankly, apart from the occasional commentspam, pretty much none of the comments I see from hellbanned users are from users who persistently make comments that would seem to justify a ban of any kind. Most of them appear to just have made a single stupid comment at some point or other that perhaps deserved some downvoting. It seems to me that hellbans are overused.

And the answer to it being overused is for people to call it out whenever a user is trying to contribute but hellbanned, and we don't agree with the ban after taking a look at their comment history.