And while South Park and Chapelle Show had the defence that they were sketch shows, Tough Crowd featured real people ostensibly telling their real opinions in heated arguments with eachother. It doesn't surprise me that it made the suits a bit nervous, especially if the ratings weren't spectacular enough for the bean counter logic that determines what politically incorrect content was worth the effort to air. Two seasons and they ended it.
A lot of them were rehearsed bits they used on stage at the time. Especially Worm, Vos and Dip.