As a Ukrainian whose relatives are being bombed and whose friends are currently enlisted - I sure hope they won't consider that at all. The only actions performed outside the internationally recognized borders of Ukraine should be in aid of stopping the invasion of Ukraine. Bombing troops and launch sites - yes. Attacking Russian servicemen wherever they can be reached - yes. Occupying even an inch of Russia - hell no.

Ukraine should even refrain from retaking Crimea militarily if things go well, unless it's virtually bloodless. This war has to end ASAP, and it won't end ASAP if Russians suddenly have a non-absurd reason to defend their land.