As fully outlined here on Derek Lowe's blog “In the Pipeline”, Quackwatch is getting sued by some quacks because he highlighted their use of a misleading diagnostic and how it could be used to push unnecessary and potentially dangerous treatments on clients.
Quackwatch have a Paypal donation system, so if you feel like committing a fiver to their defense fund, I'm sure it'd be much appreciated. After all, I'm guessing there's more money in quackery than in exposing quackery!