I've said several times that the Gleeman worlds really aren't hurting anyone, they seem self-contained, and I'm sure he brings in plenty of users. So, really, he's bringing in "his people" to his worlds and, with any luck, they branch out. He may run a few of them off but he brought them in. Current users should know enough to check what's going on in any world before joining. So the only real possible downside is a new owner that he didn't bring to HBD joining his world. He might run that guy off with the goings on in those worlds. Overall, I think Gleeman is a win for WifS and HBD.
I just wouldn't recommend those worlds to anyone.