Diddley Dee,
I lost count how many times professional pilots piped up on 121.5 telling me as a controller I was on guard.
I've already read another thread on this self-same subject, and it upset me.
Since you must have a D/F fix on most of these self-righteous twits, and hopefully a radar fix as well to identify them, isn't there a way to report them individually, and get something done about this plague?