It was the rule in our household for our kids (and the last one just turned 18). In fact, it was worse than that. We had to meet (face-to-face) any young man who wanted to take our daughter out. Needless to say, the few dates she did have were with real young men who weren’t afraid to abide by the standard.
That was a sticking point for my kids, as well.
My 21 year old daughter brought a man to the house that I didn't approve of on sight (he had obviously fallen down in a bait shop, on the metal lures isle). I held his hand extra long in the handshake clench, and when he asked how I was... I replied... "Bout half tight, somewhat pissed off, and packing. How about you?" We never saw that young man again.
/johnny