I've never bought anything illegal (but some weed perhaps) yet I feel very uncomfortable every time I have to share my personal details with any party.
I also want anonymous P/O boxes.
I just bloody don't want any party to track me nor tell me what I am and what I am not allowed to buy (unless it's a weapon of mass destruction or a human slave and there are other ways to bust people selling these).
https://www.theguardian.com/world/2016/nov/08/india-withdraw...
First: it absolutely is being outlawed, slowly but surely. The US is not yet fully there (although: try to buy a 1M USD house cash and see what happens), but most EU countries are fully there.
Second: Try and wire a large sum to your brother who happens to currently be stationed in disreputable country X or Y, and see what happens. Or mail him a box full of cash. See what happens.
In the US, if the cops notice you have large amounts of cash in your car during a "routine traffic stop", they will take it from you on the basis that you must be a drug dealer.