These kinds of laws are applied selectively in terms of attention, populism, etc.. My bet, is that if nobody is really aware that you're messing with the Russi

These kinds of laws are applied selectively in terms of attention, populism, etc.. My bet, is that if nobody is really aware that you're messing with the Russian Postal Service during 'this time' there isn't really going to be a concern. The UK Government, I believe, just this morning indicated that they would support people who wanted to go and fight. People have fought with the Kurds from various countries, though their actions were on foreign soil. My hunch is that this is political. If you're doing it for ISIS, and authorities become aware, you're somehow going to be in trouble. They will find a law that you are breaking. If you are fighting against Russian in a moment of crisis, and not completely publicly flaunting some very obvious law, then maybe the authorities won't care. In the US however, it's tricky, because if someone, somewhere doesn't like what you're up to, they can put the DA on someone and find a way to book them for '100 years in jail' (i.e. Aaron Swartz).