Zardnaar
Legend
But, they already have! On February 26th, they vetoed a Security Council resolution demanding they stop their invasion. So any resolution about putting troops in to stop them is almost certain to get a veto. (Russia blocks Security Council action on Ukraine)
Traditionally, Russia, and the Soviet Union before them, have had little to no compunction against using the veto in their own interests. They do not care what the world thinks of this. They have no interest in the political play of restraining their voting, relying on other states to vote no for them.
That's not exclusive to the USSR/Russia to be fair.