WORLDGUARD-3238 - Reported by Simon.Teague

This was mentioned in a previous report http://youtrack.sk89q.com/issue/WORLDGUARD-3228

I thought it was worth reporting on its own.

Should there not be a way to allow players to only use things like pressure plates and tripwires without also allowing them to access things like dispensers. Example use is allowing them to launch fireworks with a pressure pad, but not take the fireworks out themselves.