I almost felt guilty! I skipped both the general and PreCheck queues, and no doubt many of the people in those lines would have been eligible for the Priority line. They just hadn’t noticed it.
TSA also wasn’t checking eligibility to use that line and there was no one at the entry to the line checking for it either (TSA screeners don’t care how you get to the front of the line, they do not manage the lines). Anyone could have skipped to the front without even appearing to do so.