What a bunch of boring, old-fashioned farts.

I learned long ago the value of a decent hair-cut, and I don't like to see ancient male hippies with a bald patch and wispy long yellowed-grey hair tied in a dopey pony-tail, but if that's what they want, and they're happy to look like dirty old tramps, that's fine by me - let them carry on, and the best of luck.

The French have a term for it don't they? "Laissez-faire"? I think it's "Live and let live" in English.