I've never heard of this until now.
http://io9.com/two-fans-broke-onto-star-trek-tng-sets-to-film-their-o-1503465146
http://www.youtube.com/watch?v=lzcWmRT-nc8
http://io9.com/two-fans-broke-onto-star-trek-tng-sets-to-film-their-o-1503465146
http://www.youtube.com/watch?v=lzcWmRT-nc8
On the night of 10 March 1988 (at least) two fervent Star Trek fans had broken onto the Paramount lot. Wandering through the darkened sets of Star Trek: The Next Generation (circa season one), the fans were able to light select parts of the sets, including most of the ship's display terminals and part of the warp core. Dressed in a makeshift Starfleet uniform (with white socks), one of the fans acted as the host of what was likely intended to be a homemade documentary - at one point climbing onto a sickbay biobed, then accidentally knocking it to the floor. Taking still photographs of the various "working" control panels, the fans can be heard discussing ways of removing set pieces from the stage.