Sure, creative work recorded to some medium is protected by copyright - however, transcribed discussion is not by the standard measure, "creative," (i.e. derived for some rational and/or aesthetic purpose, such that it has the ability to be appreciated and admired on its own merits, for its own sake.)
I say publish the comments consequences be damned. If any commenter has issue with their words being published hardcopy, they will have a hell of a time trying to justify why they wrote them in a public forum in the first place.
In any case, given the indignation that is ever-present here when a software I.P. story gets posted, at least you will have outed the hypocrites among us... ;)