Why not buy some under water drills and an underwater propulsion device then go down to the marina and sink some expensive yatchs? How about slashing some police tires?
Why not study an industry you wanna take down and figure out how? Or gather an online flash mob and invade a conservative website or institution. How about running for office at your local council? Or sending letters to good and bad politicians saying what you think. Contact the media about something you believe but make sure it's the right level for what you're saying.
Or go read some leftwing theory.
Sounds like if would be a good indie film if the right tensions were played right.