Me and my friends occasionally play it, not as much anymore now. I just have some simple cheap ones, it seems that any of the more expensive ones I brought weren't much better and ended up breaking somehow. I think they are fine, as long as the people using them take simple safety precautions like wearing protective eye glasses, and if it has an orange tip or something that lets you know it's not a real gun, and maybe have an age requirement to buy one (13 sounds about right).
I've had times when the police overreact to the them in my neighborhood. Other times where the cops were really cool about it. It seems the people that don't know exactly what airsoft guns are are the ones that tend to overreact.