Yeah, which is vile, granted. Not sure what the actual *crime* here is though given you'd be hard pushed to find somebody that hasn't made/laughed at a 9/11 joke, AIDS joke, cancer joke, dead celebrity joke, Jimmy Saville jokes, in their lifetime.
Difference is none of that was televised.
Context is important of course. But if somebody who had some form of cancer went and saw Frankie Boyle Live at the Apollo, I highly doubt Frankie is getting arrested when the member of the audience finds it offensive.
Baffles me that people pick and choose what's offensive when it suits.
I've seen the same people crying about cancer jokes, sit and make 9/11 and rape jokes. It's either all allowed to be joked about or none of it is.