I think, yes, users are capable to use this (my personal experience with other users). Nothing more complicated like create new topic in forum. And, Bugizlla dialogs can be modified to be more simpler. Or use another system to tracking (Trac, Launchpad,...).
My suggestion is not about Bugzilla, but about to start using track system.
(and sorry for my english)
And off course, the track system (Bugzilla) is very good tool to post self-made quests (or graphics/maps/scripts) from SDK to review by developers