No goalpost moving, here. Re-read the challenge: "can anybody who objects to a self-identification law point to any measurable harm caused by one?"
An isolated incident is not that. An isolated incident is an isolated incident.
Are you seriously making the case that your entire objection to this law is based on that one isolated incident? Somehow I doubt it, but if you say it is, I'll take you at your word.
As for whether I was playing silly buggers, if I was doing that I'd simply have dismissed your post by pointing out that I asked for harm caused by the implementation of a self-identification law, which you did not provide. Instead I recognised that you were attempting to comply with the spirit of the request and engaged in good faith. To which you responded with dishonest, hand-waving dismissal.
Utter nonsense. You have asked for examples. You have been given them. Be honest and accept you are wrong.