If you’re downtown and like-minded you could go to Metro’s HQ building for a rally against the announced random bag search policy[Facebook account required for some reason]. It’s organized by the Flex Your Rights folks but has a number of other organizations and folks on board. I’m not sure I hold out much hope for their success but I’d be there to lend my emotional support if I was anywhere near downtown right now…
If you can’t make it you can always peruse FYR’s guide to refusing metro searches.
Metro’s Headquarters Building, Lobby Level from 6:30-7:30pm
600 Fifth Street NW
Washington, DC 20001