(I seem to have been misunderstood quite badly, a sibling comment to yours makes exactly the opposite allegation! Also, I'm a Brit)
The risk of any ban system is that true-but-inconvenient stuff ends up getting banned as well. The very real risk that video evidence of murders by police might be banned for "promoting violence", for example. There's already the controversy over removing evidence of war crimes in Syria - kind of understandable, given that those must be pretty traumatic videos.
(yes, this is a pre-crime argument, but crimes against humanity committed by and on behalf of states or warring ethnic factions are qualitively different from ordinary crime.)
I think you’re inflating the views of the few outspoken fools too be that of the majority.
It's increasingly difficult to have rational conversations with Americans these days, and this idea is certainly a big part of it.
It just astonishes me that Americans see little difference between a private company forbidding liars from using their free service, and people being rounded up at gunpoint and being killed.