you won't make any enemies (or friends, for that matter) on Wiki
Each time an authors signs a comment, they wager a little bit of their credibility. With each "good" thing written, other authors re-enforce the idea that the poster is "smart" or "insightful" or something. With each "bad" thing, it makes other authors more likely to "flip the bozo bit" and maybe start ignoring statements out of habit.
If KentTheBeck writes something, and the reader's thought is "What? That sounds stupid" .... Wouldn't most authors around here read it again, and try a little harder, before deciding it is just a "dumb" comment?