We took ours everywhere, even taped the shows (Lion King, rides, Wishes) we just made sure our light was off so not to disturb other guests. I also saw some people with the big ol' honking ones. The only restrictions were the lights
I had a cast member get in my face on Stitch Escapes and threaten to confiscate my camcorder if I did not turn it off. It really freaked out my two kids who were 6.
I turned it off. I was not using a light or anything. The cast member said I was violating copyright laws, but it was his hostile tone that was startling.