In the United Kingdom we had similar problems regarding the law. A group of Airsofters (players, site owners and retailers) lobbied parliament and we were fortunate enough (along with re-enactors) to gain an exemption. Basically our Airsoft Sites are now registered and if you play 3 times in no less than 2 months your card gets stamped and you receive an annual membership number. Once in possession of this number you are registered on a national database and are entitled to purchase RIF's (realistic imitation firearms) . This system works. If anyone wants to know more about this system please feel free to PM me.
If you don't take your hits you won't get your pudding!