We've been using phpBB3 as the forums for our business, and we've been plagued with spam bots left and right. In the end, I had to scrap the forums entirely because of all the junk. Our business needs a forum to operate, so I can't take the time to build one from scratch.
Which forums systems have you used in the past, and what's your experience with avoiding spam in general? Is there a commercial solution that's best for this sort of thing?