The AR shooter owners are not hunters or even casual target shooters. They just want to own a rifle and shoot it. They have no interest in accuracy. Remington just filed for bankruptsy because of the lack of interest in bolt action rifles.
Go to Camp Perry, or any leg match around the country. You'll see one or two High Masters shooting M1As because they've already done it all, and a few old duffers like me shooting M1s because we have no hope of legging anyway. The rest will be AR-15s. When built properly and loaded correctly, AR-15s can be capable of outstanding accuracy. Granted, a lot of ARs, and nearly all Mini-14s and AKs, are just blasters. These are fledgling gun owners, trying to figure it out. It's an opportunity for us to educate them, not in the "your rifle is crap, get a real one" sense, but basic safety and respect, and adherence to range rules. Remember, a new shooter is as proud of his equipment as you are of yours.
My first rifle was a sporterized SMLE, capable of 12" accuracy out to nearly thirty yards. I shot that one until I could afford a better rifle, learning all the way. It would have been really easy for a few rifle snobs to turn me off for life, but the guys I ran into on the range helped me learn to do the best I could with the equipment I had, and were there with advice when I was ready to upgrade. I try to be those guys for the new shooters I run into. I explain why my rifles look different from theirs, why I shoot differently, and show them a few basic techniques. Silhouette ranges are great for this, because there's an instant gratification factor. Watch a new shooter drop his first ram at 500 meters, and you'll see a lifelong shooter being born- unless someone screws it all up by snubbing his equipment. I used to have a Remington 788 in 7-08 with an old Weaver K10 for just that purpose. Low recoil, pure death on rams, and not unreachably expensive. There is no point in a new shooter owning a BAT-actioned, Krieger-barreled BR gun with a McMillan stock and March scope. It's a complete waste until he learns some shooting technique and decides what he's interested in, and that's up to us.
It's easy to forget how much time and money we have put into our equipment over the years. Sure, it doesn't cost that much more to get a decent rifle that is capable of pretty good accuracy. The problem is that a good rifle needs good optics, good reloading equipment, good components, and good skills. We've accumulated all that stuff over the years, a little at a time (at least I have), so we tend to forget the sheer cost of it. As long as blasting is all they know how to do, they won't have any need for anything but more drum magazines. Let them shoot some really good guns. Show them what their own blasters are capable of. One of the more impressive moments of my early days was when one of the silhouette guys picked up my new CMP M1 and went 7 for 10 on the rams with it, offhand. Try to make the new shooters feel involved and welcome. Invite them to range days, and put them to work alongside other shooters, fixing the damage careless shooters have done. When they have a stake in the range, they'll take care of it.