Oh we recently had this nice article about it being entirely legal for germans to join the war and on either side so long as they are identifyable as combatants and dont do warcrime..... buuuuut we would stop people from fighting on the side of russia as well as anyone they deem to be an extremist would be stopped from going to fight for ukraine, too. Obviously i think fighting for any nationstate to be a bad idea but it is also clear that this requires giving up on the idea that we shouldnt illegaly detain people for legal activities. Yeah its not great.
We also banned russia today and sputnik from europe. So now if you only follow normal news you can only learn negative things about the west and only positive things about russia unless of course you believe everything unquestioningly, if you dont, well those are the parts you can believe from western media becouse they go counter to what theyd like you to tell, so... Now if i was cynical id suggest maybe that is the aim, to make people more extremely opposed to the west so that they can justify more violence against dissenters... other than that i dont see there being a point to it.