The Key word here really is 'responsibility'.
Using common sence and being responsible in the use of your toys and you can avoid such occurences, unfortunatley children by their nature don't think of such things and as such its usually them which are involved in the situations as described above.
Here in the United Kingdom (and i'm guessing in the US as well) airsoft owners / player's are highly reccomened to use their 'toys' only on offical skirmish sites and in doing so avoid such problems. These sites (more often than not also running as Paintball ) offer a safe environment for the players that is out of sight of the local populus and as such avoids said incidents. As a precaution the local police are always informed of the site's purpose / presents and therefore when for example '20 armed men' are seen drilling in the local woodland, the Police already know that they are more than likley to be nothing but airsofters and as such avoids wasting Police time and endangering the public.
Unfortunatley (As mentioned) its usually the thoughtless individuals that jepordise the sport, and more often than not this tends to be in the form of young kids with their £7 springer shootingat there mates.
I don't think people should be discouraged from partaking in airsoft skirmishing but instead should be made fully aware of correct practise and the very serious consequences should they not adear to them.
Back to the original question
Been playing airsoft in one form or another since i was 12 (now 21) have dropped out of it a few times (due to work, college and various other reasons) but always returned after a short time.
Been skirmising on regulated sites every two weeks or so for the past 2 1/2 years and throughly enjoy it
Presently i own (but have owned various other things):
TM M4-A1 Carbine (upgraded with spring, bushings)
TM P90 (upgraded with Full tuneup kit)
Maruzen APS 2-Sniper version (upgraded with pretty much everything

)
WA SVI 5" Black
WA SVI 3.9" Black
WA Wilson Highcap Black
Tanaka Glock 17, Fixed slide
As you can probably guess from my above statement i'm rather into airsoft. I heartly enjoy it and encourage anyone to try it.
For me (behind a computer most of the day) its a great way to get out doors and let off a bit of the steam that gets build up during the day
Just be sensible, use a bit of nouce and you'll be fine