Wow... uber thread... it's immune... but here's my 2 years 2 late 2 cents...
This happens all the time at art shows... which is similar to what F&G is... If you were a vendor, would you want somebody taking pics of your painting so they could go have it duplicated and then you lose out? The guy had the same problem... although there's no "law" about it because on Disney property, even though it is private, you can pretty much take pictures all you want unless noted... but just for future reference, to avoid altercations, don't take pics of people's works without asking permission... for all he knew, you were going to steal his idea and recreate his hardwork on your own, then he'd lose money... remember, he was paying to have that booth set up to sell his stuff, not have people take pics of it and make it themselves...