Yes, to me it looks like he’s adding an official license-like note, but then declaring that he’s still GPL compliant because although his note is easily confuse

Yes, to me it looks like he’s adding an official license-like note, but then declaring that he’s still GPL compliant because although his note is easily confused with a license it’s not actually a license. He then gets cranky if people remove his not-a-license note or don’t act like it’s a license. Feels very much to me like he’d be better served with something other than the GPL if he doesn’t want people using his software in GPL-permitted ways.