I've been on both sides of the random ID checks, both sides of the spot checks, both sides of the screening, both side of what I consider questionable profiling. I sort have made my living protecting personal freedoms and identities. Yeah, both sides of the government and individual too.
It's annoying, somewhat questionable, sometimes it's great timing, sometimes not, to be asked for id.
But you know what? They ask. And we have the "right" to say no. And then in some instances, we have the "right" to seek further legal advice.
I kind of like the system, deep down inside, all of you do too. It is the best there is, and will only get better. Because we are all about the individual.