Opt out. If we don't exercise our rights, we lose them.

"What if they retaliate and make life difficult for me? "

That's both illegal and against policy. If someone delays your right to travel for this specific reason, delay their job by asking for their supervisor and their name and employee number. Then file a complaint. That will dissuade that public servant (and their leadership) from exhibiting such behavior and encouraging it respectively.

"But they are capturing your image in 10 skillion other public locations."

1. Sure, and you have the option to create your own privacy in public.
2. Further, what's the real purpose of the scanner at the TSA check if they already have that detailed image of your retina, your facial pore patterns and whatever the fsck else they store? They don't have that level of detail yet on CCTV.

If you don't care, then that's fine. Some people don't mind the slow encroachments on 4th Amendment protections. Cool. Others do. Cool also. That's why we can opt out.