"...will all those wishing to record please form an orderly queue for permission..."

You don't have to go that far, Jim.

You could simply inform on such a notice that it is customary, and considered good manners to ask the musician's permission to record.
If you wanted to, that is

I know it can't be stopped; I'm more lamenting the fact that there are people out there who think it is their God-given right to record you no matter what.

If you read the posts, nobody objects to recording or photography, per se.

B.