Well, I've thought about this, and here's our potential options - feel free to add in the mix.

1) Write our Congresspeople.
2) Create an online petition. (Not always effective, but may have a bit of impact?)
3) Organize a "No-ID" day, flooding TSA with no-ID passengers to deal with. (Either can be at a specific airport, or nationwide. Nationwide may be more effective, but will require more coordination. Can be spread to a few days, in different regions.)
4) Flood TSA HDq with letters. (Probably won't be very effective, tho.)
5) Organize a protest at airports by going up to the ID checkers with signs and/or verbal protests.
6) Do nothing. Just let this roll by. (No way, jose.)