offcourse porn websites allow bitcoin payments, its best for anonymity
Anonymity is upto certain limit as the transactions can be tracked end to end. Only important factor is that the user can't be identified.
transaction tracing can be prevented by using some mixing or you can even trade it to another altcoin and then buy the bitcoin with alt coin again, seems like criminal but it's the effective way if you don't want anyone to catch you, bitcoin is not about you send and you receive, bitcoin is unique and useful,it even widely used in deepweb as i know
as long it's legal, it's fine
Yeah its possible but various transactions need to be done to hide complete identity. I don't think identity matters in camsite as most will at the two ends of the world.