I've said it before and I'll say it again. If the Isthmus fears being too heavy handed or that they'll be accused of stifling dissent, so be it. You've got a community of posters and advertisers to think about and while you may like to think of TDPF as a marketplace for all ideas, it's more than clear that certain posters aren't interested in discussions. They come to TDPF to be disruptive and brew some anger. They aren't forons, they're trolls, and showing them the door may feel awkward, but I suspect they're used to it.
I know we've lost some good posters to the playground mentality that these trolls create, and I think it's a shame that it's tolerated.