A couple of years ago I was told by a bag check gentleman that I could not use the Rode Videomic on my DSLR in the park without the written permission of the Magic Kingdom Park's 'Publicity Office' because it was considered 'professional equipment'. I explained it wasn't and that I wasn't, but he just repeated the warning, so I said 'OK', took it off and stuck it in my bag.
I then entered the park, remounted it and used it to record a parade without incident.
There appears to be a rule against professional looking equipment at least, but perhaps it is loosely enforced.