Photo ID
I filled out a guest comment card and now an on-line survey to let the Four Points Sheraton LAX know that I will try to use a different hotel in the future because they made me show government-issued photo ID in order to check in.
I recommend that other people also avoid this hotel for this reason.
I still feel guilty for carrying government ID at all. I really believe that this decision on my part is causing externalities that harm the public. I would like to write about that in connection with trusted computing (because the problems are closely related, from a certain perspective), but the trouble is that very few readers may have a strongly negative view of ID cards. If they don't agree that ID cards are problematic, an analogy between attestation and ID cards could be unhelpful (or even counterproductive) for describing why attestation might be problematic. It might be ignotum per ignotiora.
"How can being able to prove what's true harm me?"
