[hahainternet]

> Deciding that other people are too stupid to be able to do this, and thus those other people need a government mandated filter at the ISP to filter adult content is perhaps a bit authoritarian.

How is it 'authoritarian'? The motivation here is clearly to make it easy and therefore usable, rather than difficult and therefore unusable.

> I don't know what the answer to protecting people from extreme imagery is, but I do know a government filter isn't it.

How do you know that it isn't it? It seems to me that you've started from the axiom that it isn't it and come to no conclusions whatsoever.