Well, it's your show, but I think you should let him on. It sounds like you're deciding to censor him for political reasons (not wanting to give him publicity) and that strikes a bad note with me given all we've been through here in Berkeley these past few months. LaRouche is an extremely intelligent, eccentric/odd ball kind of guy who seems to have made enemies with just about everyone. He's not "dangerous" or a fascist, and I think it would be a lively and interesting show.
As an aside, about 3 years ago, I (and some friends) got to meet Ramsey Clark. We were all surprised to learn that Clark was working on an appeal for LaRouche's legal case. He gave us a summary of the case, and while I don't remember the details, it definitely sounded like a politically motivated frame-up.
Adam