I come across a lot of crap project managers. They fail to deliver on their part, yet question everything you do and constantly try to undermine your authority as somebody who has been brought in specifically because he DOES know what he's on about.
Often these cretins try and snuggle up to their director and put on the appearance of appearing competent. Sometimes, they win them over. Usually, they hang around for a year or two then move on before there's no excuse left for them to use and the chain of disasters behind them speaks for itself.
I'd also love to find a way of exposing bullsh1tters, charlatans, egomaniacs and nincompoops before waiting for the inevitable 'evidence'. Any ideas?