There's nothing in signed law that states you have to present an ID to fly within the US borders!

Print your boarding pass, if you have luggage go to the ticket counter to check your luggage, they'll ask you for ID, say you don't have any, they'll give you an SSSS'ed boarding pass and take your luggage.

On your way to the checkpoint dump your SSSS'ed boarding pass, enter the line for the BP check, inform the reviewer of no ID (you'll probably get a cute question like "What? No Costco card or anything with your picture on it?") and they'll direct you where to go.

It's all quite painless and I've done it numerous times (EWR, LGA, JFK, DCA, DFW, MSP, SFO, DSM) and thankfully the TSA has finally (FINALLY) figured out the process for those traveling w/o ID (or refuse to show).

The best/easiest answer to the ID question is "None." and not "I refuse to show." as that puts the requester into a suspicious attitude and may get you a bit less "friendly" (can the warm, cuddly TSA really be considered friendly?).

Again, no ID doesn't mean no flying. Just a secondary (LOVE those TSA massages!) with an ETD swab of your stuff.

Best of luck - I'm heading out of EWR this evening and plan to do the same myself!

BF