As most previous guys said, as long as you can perform some of the required functions (aiming, holding the weapon, etc), most people are mature enough to accommodate and maybe even support you (that's one of the biggest things I like the sport - the community) . Just make sure you let the players/game organizers know before hand, to avoid harsh words being thrown around.
Also, as someone mentioned above, if someone were to make fun of you, I'm pretty sure the rest of guys/game organizers at the field would be looking down on them. In any case, just ignore, world has too many a**... (not good people) to worry about every single one of them.
