Some people just don't get it so I will make it simple .....
-Little Johnny shows up to your airsoft event and signs his waiver.
-Mommy and Daddy signs their waiver for little Johnny.
-Event promoter/Team Rep/Field owner signs waiver
-Johnny gets shot in the tooth and it get broken
-Little Johnny doesn't care but mommy and Daddy are pissed
-Mommy and Daddy sue above signers and the dog that was there that day
-Lawyer shreds your waiver in court so it doesn't hold up so bam the above signers are paying for little Johnny's injuries
Or
-It does hold up in court and Mommy and Daddy are still pissed because they lost.
-Mommy and Daddy go to the city/county/state and make a case to have airsoft banned to protect more kids like little Johnny remember they are pissed still..
Or
-The Media gets a hold of the story and some government official gets a tickle in his nether region and again your sport is banned.
-You now own a bunch of useless crap because you can't play anymore without a fine/jail time/ or loss of your gear.
All of this because some event planner or field owner doesn't want to make someone do something, because we all know that people today are responsible for their own actions....
All of this could have been avoided if you had made little Johnny wear a full face/mouth protection.
As far as mouth guard like the ones in football that cover both tops and bottoms I can vouch that they do protect the teeth I took 3 rounds from 10 ft right in the mouth busted up my lips and gums real nicely but all teeth came through just fine. That poor kid was crying by the time I got done with him.....
Personally I don't wear face protection or mouth protection anymore but hey I'm 40 so I figure my teeth are gonna go soon anyway and I have always wanted a gold tooth with a diamond in it....
And banning kids is not the answer that would kill our sport faster than Paris Hilton can get in trouble for something stupid.
Just look at what is going on with football right now some kids got hurt and there is a growing movement to ban football in high schools, middle schools, and little league. We as a sport don't even have 1% of the backing that football as a sport has.