It would take a week long moratorium from everyone to get their attention. Sell, everyone sick of the political posts. I really don't see that happening
Find the worst offenders and get the URLs of their most offensive posts. Next, send in a feedback form with the usernames and offending URLs. As I understand, recommendations have been made on having the political posts flagged like the NSFW posts so that they can be filtered out by users that aren't interested in such posts. It doesn't hurt to have a pro account when filing complaints. So far, the worst offenders are the loudest against it. Me? I don't post a lot of political memes, bit when I do, humor has to be the key element.
I know you are deep into Chaplin, so I tried to match this pic with an old, familiar quote but my search for the proper attribution failed. I apologize. I cannot believe that Marx said this but who can argue with the internet, right?