If you're protesting big banks, don't go set up a tent in a park. Go to a big bank branch. Ask to open a savings or checking account. Fill out the paperwork as slowly as possible. Ask a million questions. When it gets to the part where you sign and open an account, have a change of mind and walk out. Do this every day at every bank you can. Bring 10 friends. Occupy the time of every bank employee. Be charming, polite, and entertaining. Eat all the complimentary lollipops, and take home all the brochures about home loans. Make origami, give it to sick children. And for God's sake, shower.