If you're getting a lot of abuse then your system probably stinks, as, by and large, people aren't assholes or want to be angry. They just want to take their holiday snaps, you know.
So here's an alternative take: just let people take their holiday pictures. If you're really that worried about people getting stabbed to death by tripods or whatever then set of a "tripod area", or make sure it's at least 4 metres from the rail track, or whatever. So many more options than "no fun allowed!"
(Of course, all the British all really tired of being told what to do all the time, so give a British person just one iota of power and they will transform in to the most pedantic and inflexible person.)