I'm of mixed mind of them, along these lines:
1) I don't want to *teach* kids that toys are guns, and therefore that guns are toys. I don't think that all kids in all circumstances would take that lesson from playing with toy guns, but the bad outcomes as you can imagine could be *very* bad.
2) That said, I think there's at least one positive outcome possible in using toy guns, which is for kids to learn that "gun shaped objects" don't cause cancer, or promote evil, or change into goblins and night and conspire to choke the pets. Most kids I think have no real problem distinguishing between an Easy Bake Oven and the real thing, or a battery-powered jeep sized for them and a road-worthy car. (My niece says her kid-scaled Jeep is a good way to get around on "Planet X," otherwise known as The Basement Toyroom.) I have no problem with a (supervised) 4-year-old learning (and enjoying!) fine motor skills with something like a Nerf gun, or even (I know I am a menace to society) low-powered airsoft guns (with proper eye protection and instilled safety lessons). I was probably 8 when I used long-saved nickels and dimes to get a pretty nifty spring-based plastic gun that shot little orange plastic bullets, and never once did I think it was a "real gun" -- which is something I didn't have access to for many more years.
3) I just ordered a couple of airsoft guns myself, for in-room plinking at odd moments (telecommuting has its upsides), of the kind that, aside from orange tip, looks to be a Brady Campaign nightmare -- metal shell instead of plastic, styled very much like a Walther designed pistol. (
http://www.thinkgeek.com/geektoys/warfare/a213/)
From the description there ("If it weren't for the blaze orange tip and the slightly smaller gun size we'd be a bit concerned about our co-workers packing these at office meetings.") I can tell the guys at ThinkGeek have not read through the mousegun sticky on THR - this gun is more than 6 inches long!
timothy