Let them shoot what they want, just as long as they are having fun. If they want to hunt, make sure they are shooting well, reguardless of what they shoot.
I have been shooting a compound for years, i love it. I don't think I'll ever give it up. I can easily draw and shoot heavy weights with huge amounts of energy and speed, with great accuracy. I like shooting 5" groups at 60yds. It's fun.
It has gotten to the point that I want more from hunting. I haven't seen much of a challenge in a few years, don't get me wrong, I still love it....i just want to enhance it with trad gear. After shooting a bunch of deer with the compound last season, I finally took out the recurve to add to the challenge. I was shooting well with it and hoped I'd get a deer to come inside of 20yds. i did the 3rd morning out and shot a great buck. That got me hooked. I have been shooting my Longbow now and am very good with it, i can't wait to take an animal with it. sure I will still hunt with wheels, but why not enjoy the best of both worlds.