Honestly, with the mobilization I think it's easier than ever. Armed conscripts could gather together and rebel against their officers. If people truly oppose the war, more would join to the rebellion than against it. Civilians would have a much better chance protesting now, that everyone can see even soldiers oppose war. And thus we reach the conundrum. Perhaps this doesn't work bc simply put not enough ppl oppose the war. They may oppose it because they're losing or because they consider military leadership inept and are angered that they are the ones paying the price for that ineptitude. But they don't oppose the war for being unjustified, wrong, fought unfairly brutal against Ukrainian civilians or any other of those things. The just hate that they suck at war and it's the one thing they had told them they were good at.