Frankly, I could not care less whether people on beach wear bikinis or whatever, but from what I could see, the guy was neither confrontational nor aggressive, which cannot be said about the young ladies. Also, it's not quite clear how the girls behaved before Dorn approached them. And lastly, he was spot on when he said that they are insecure and in search for worldly validation (just see the image they took and later posted). All in all, your lukewarm goody-goody approach is an equally serious turnoff as the “holier than thou” in-your-face proselytizers. And your implied higher moral ground is particularly repulsive.