Earlier quoted context omitted.
> Self esteem devoid of any underlying achievement is hollow. In the end you're basically manufacturing narcissists, with a fragile falsely inflated self image covering a chasm of insecurity. Precisely. At the same time, I think that social connections divorced from physical reality -- as is on the Internet -- compound this to the nth degree. I can pretend to be an amazing dancer or boxer or chef on Facebook, but it'…
> The first rule of social dancing is that you want to welcome new dancers. The second rule (which, really, overlaps a lot with the first rule) of social dancing is that you don’t, ever, offer unsolicited coaching in the context of social dance. And part of that is because almost no one is in the mental place in that context to take it well.
I suppose you could use "whether someone attended the 'lesson' period" as a sign of whether they will take coaching well.