I don't have any problems with people who want to record a song to learn it, or to just learn the tune, as long as I know it's being done. (So I can properly mess up, which I regularly do when being recorded.)

It's the publication I don't think is right - as in archiving and sticking stuff on a website without permission or knowledge of the participants. I prefer to make a fool of myself with as small a number of witnesses, and as temporarily as possible!