Every Bitcoin ATM I've seen here require you to look into the front-facing camera and insert/swipe ID.
An easy solution to that is to find a homeless person nearby and use fake IDs -- i.e. bribe someone else do the transaction instead of you
If the cash loaded into a bitcoin "atm" is legal, it's traceable. If it is illegal then your results may vary, most likely to your financial and legal detriment. If you think a bitcoin "atm" is a solution to this problem then hopefully your lawyer accepts bitcoins.