That is a fair point; I think many people will agree on "statement of problem" - pornography is a quick example which is a perfectly legal activity but a) may b

That is a fair point; I think many people will agree on "statement of problem" - pornography is a quick example which is a perfectly legal activity but a) may be privacy-demanding and b) payment methods are being denied based on... not legal requirements :). Cash was nice - fairly anonymous. Digital anonymity seems to be harder. Currently, Crypto to the best of my understanding is not necessarily the solution - it is extremely trackable inside the system, and vulnerable at the edges of the system.