The "unwashed masses", as you call them, are already getting plenty of exposition to crackpottery, much more than they get to real science, so that a few crackpots on BHTV are barely a drop in the ocean. That's not what concerns me, no.

What concerns me is that BHTV has a reputation as a respectable website thanks to the participation of respectable academics and experts. It's reasonable to assume that such a respectable website wouldn't invite crackpots to promote their brand of crackpottery; in fact, that's an assumption I made myself until I read Sean's and Carl's posts. Inviting crackpots therefore gives the impression that these people should be taken seriously, even if we think they're wrong.

In any event, your own motives are suspect, to say the least. Characterizing creationist nuts as "people whom [Sean and Carl] don't like", as if creationism was merely a distasteful political opinion, or something, makes you sound like a crackpot yourself, or worse, a postmodernist.