It's all in the context. If it were on their own private property no one would care. Being at an AMA field, they represent everyone there. People have the right to complain about it just as if some one went streaking across the infield (I sure as heck would not want to see any you old farts streaking across the infield!). Do it at their own house fine, on their own property great. Do it at an AMA field which is each members living room, it doesn't go over well. I can throw my feet up on my coffie table, just not on my mom's!