I think ludwig has hit on the main point about Boyle's controversy.
As ludwig says, genuine satire - which is designed to make you think as much as laugh - of the sort produced by Chris Morris - is genuinely pushing the boundaries, rather than Boyle's somewhat smug attempts to upset people.
Frankly, simply using the 'switch off' argument is dodging the issue because it side-steps what is acceptable, and what is not, in terms of our society.
If someone produced a show where cats were eletrocuted on live television, I would use my 'off' button and not watch it - but does that mean it is acceptable to produce such a show simply because it has an audience? That is the argument apparently being used by Boyle's fans - if you don't like it (with the unspoken implication that you are humourless for not seeing his wit and wosdom) then do something else.
Well no, that simply will not fly as an argument.
As a society, we have to have cultural boundaries and simply advocating the some people find something funny does not of itself excuse the upset and offence caused to ohers. This is the territory into which FB has marched, fully aware of his impact and notoriety.
But such a position has limits - you cannot simply go on and on finding new ways to upset and offend people, which must by definition become more outrageous and extreme as time goes on - just because you can.
I feel that Boyle is using the vehicle of the comedy art-form to subvert and de-sensitise his audiences, and that has to be the very opposite of what commedy is supposed to be about.
I would place Mr Boyle in the same catagory as Chubby Brown - a commedian who attracts massive audiences who pay to enjoy his work, but are not offered it through media which stream into peoples' homes for consumption which must be governed by the individual choosing toi avoid it. All Chubby Brown's posters advertising his appearen