I never touch or push off of anything unless absolutely neccessary, but unfortunately a lot of divers do feel the need to touch everything in sight when wearing gloves. Not long after they built the pen, I was trying to see what was inside of it and grabbed the fence, never expecting there to be any stingers attached to it so soon. It's just a man made fence, so I saw no harm in it. As far as using gloves other times, I had a nasty hydroid sting on the back of my hand from having a loose floater bump into me. I don't see a problem with divers wearing protection, just in case, but the dive masters have better things to be doing than deciding who is responsible enough to wear gloves, and who is not. So the park rules should apply to everyone. I for one will still be wearing mine when not in the park.
A couple of years ago while I was staying at the BA, the current reversed and caught some snorkelers out by the pen. It swept them into the mesh and they got some pretty nasty stings.