There's an obvious difference between trying to hurt people and not trading with them yourself. If the distinction is difficult, there are laws to define this 'war crime' thing, you may wish to consult them.
Also, Russia is relatively self-sufficient foodwise. There'll be shortages but no starvation. I'm sure though that if starvation was serious possiblity the West would exclude food imports.
>Ah yes, because seizing Russian assets overseas is the same as "not trading with them".
Your bank account is held under terms. There are cases where freezing withdrawals is allowed.
If you wish to avoid that, you are entitled to store your money under your mattress (or use the latest crypto fad and be subject to absurd exchange rate variations).
Also, Russia is relatively self-sufficient foodwise. There'll be shortages but no starvation. I'm sure though that if starvation was serious possiblity the West would exclude food imports.