Don't forget that legal way to buy Bitcoin is through the certified exchanges that require ID verification. Meaning, these certified exchanges will comply with all the sanctions and getting money back in your bank might not be trivial and risky.
LocalBitcoins is blocked, but there are still analogues (not with greatest rate, but anyway).
Russia <-> Crypto relationship is complicated and recently Central Bank proposed additional restrictions, but its not approved yet.
https://www.reuters.com/business/finance/russian-cbank-propo...
I suspect - but absent evidence this is speculation - that you can probably pay with gold and 'hard' currency easily right now in Russia, this was the case before the iron curtain fell (illegal, of course) and I don't see why it would be any different today. People hate being paid in a currency that loses double digit percentages of value overnight.
Also, if you want to arrange buying bitcoin (with rubles) in person with a stranger on the internet, and arrange physical meetup in some secluded spot in Moscow, then getting arrested might not be your only worry.
Have you tried taking more than 10k € across an airport?
And just because you normally can't move money to north Korea, if you do this with P2P you are equally breaking the law. Same for Iran and Venezuela I believe
That might be US law, but not all countries have such laws. It depends on where the exchange is based.