That would be my generation. 18 here.
My family's always been gun-friendly. My great-grandfather started me out on his knee at age 5 with an ancient little BB gun I still keep in my safe, though it's broken, and throughout my childhood, Dad would take me out to shoot alone or with friends (his, not mine - not many kids in the neighborhood). I'm now a raging gun nut and perfectly happy with myself. My family and friends, through their exposure to me, are all quickly going over to the "hey, guns are cool" side...
But.
Talking to friends online (instant messaging generation, y'know), the two trends I'm noticing are that, firstly, there's the drive amongst younger teens, and some older ones, to be different and counterculture and rebellious - this means lots of Che shirting, Bush bashing liberal alignment without really knowing what they're doing, or what they're saying. They're trying to be different and establish themselves as outside social norms. That's what teenagers do. Wisdom comes with age, and a lot of these kids are going to change as they get older. Eventually, at least some of them will ditch the Che shirts and the berets and the hammer-and-sickle flags and come to their senses...
...and, secondly, a lot of the hippie-liberal crowd (and a lot who aren't) are fine with firearms on the face of things, but they don't think of them as tools or useful objects - for all intents and purposes, they're "videogames that go bang". This is where we need to be focusing, in my opinion. Just about any young teen these days has grown up playing all the usual stuff - Grand Theft Auto, Counterstrike, whatever military sim the Xbox 360 guys are hyping as next-gen this week - and they tend to think of guns as cool toys and not much else. They don't really comprehend the deadliness intrinsic to something that spits out lumps of jacketed lead at high velocities; they just focus on the "boom" and the puff of dust downrange.
To a lot of younger people, the RKBA simply doesn't exist. The concept of a gun as a tool, an icon of an inalienable human right, is over their heads. There was an article posted here a while back, wherein some lefty college kids got their hands on an "XKS sniper rifle" and hilarity with tupperware ensued. Now, we've got a bunch of urban white art-student kids out in a field with a gun - and they're okay with it. They're playing with it, taking turns shooting with it, and generally doing things other than pissing their pants or trying to nudge it into a raging bonfire with a long pole while hiding behind a rock.
But they know nothing about it, screwing up something as simple as "SKS" (and, if I recall correctly, they fudged the caliber too): because, to them, it's just a gun "or whatever."
And that's the key.
Don't just take your kids out shooting; don't just introduce your college roomie to punching paper; you need to teach them what it means to be armed, whether on their person or in their homes, and how deeply important it is to realize that a gun is a weapon, a tool, something capable of preventing bad things from happening, whether on the scale of a single dark alleyway or an oppressive national government.
Young people these days have been exposed to guns enough to be okay with them - but they're really just fun to play with. That's it. They need people older and wiser than they are to open their eyes to the idea of guns as useful tools and lifesaving implements and protectors of liberty, personal and national.
If you ask a kid these days what he thinks about guns being banned, you're going to get a shrug and a "meh" - there will always be new toys to replace them, and they don't shoot guns much anyway, so whatever, they're just gonna go home and "play some Gamecube, alright dude?"
What we need to do is impart in their minds the distinction between toys and a human right. They need to understand the gravity of what holding that little chunk of metal in their hands does. They need to look at it with fresh eyes as something more than a plaything, or something mundane and unimportant like a gardening spade or a fire extinguisher.
(This applies to the under-18 crowd; once they get to Berkeley and start eating their profs' crap, all bets are off.)