I've had quite few experiences (problems) in doing business with unprofessional people and also heard a lot of bad stories, but they were all related to small, or private owned, companies. However, what amazes me is the number of lies those developers tell, and their unprofessional way of dealing with the clients. The worst among all is the master developer "UDC" !!!
I will say it again "DO NOT TRUST A WORD THOSE PEOPLE SAY"