#10 It depends. If the player who let go of that bat has deemed it a favorite, they'll usually ask for it back (but often times give the injured fan a different bat).
#18 Doesn't work that way, sadly. When my stepson lost his four lower front teeth and half of his two upper front teeth after taking a wicked shot to the mouth on a line drive in the only MLB game he's been to, the Seattle Mariners gave him an autographed ball from a second-tier player and four tickets to a future Mariners game. Four cheap, outfield tickets.
There's a doctrine in play there called "assumption of the risk. One of the first things taught in law school (at least it was when I went) on engaging in hazardous activities that result in injury. The earliest case I know of where that defeated an injured fan's lawsuit is Brown vs. City of San Francisco Ballclub. Google it if you're interested. Should be easy to find.
#19 Have you seen how much ballpark nachoes cost lately? I think bridgework to replace the teeth that got knocked out is cheaper.
