Don't shoot the messenger..
It's not against the rules to take pictures, even over the walls.. They are specifically looking for:
- Holding or a tri/mono-pod in the air to take pictures over the wall (safety hazard)
- Standing on Planters, Scenary, Chairs, Tables, Trash Cans, or other park facilities
- Climbing the wall and hanging from the top to take pictures.
I can tell you with 100% certainty that of the 2 people that were bounced from the park.. One was standing on top of a closed Ice Cream cart (large one with the hand brakes) and the other had a camera on a tripod that fell off (and subsequently over the wall) ... They would have been fine except they went to guest services to try to retrieve their camera..
Just be careful guys.. Thats all I'm saying.. Security DOES like to trespass.. It's pretty much like giving someone the death penalty in WDW