The code is loose to allow for terrific RP possibilities, lets not ruin it with too many codified restrictions. This is a gray area. One that happens to fuck you in the ass, but a gray area none the less.
I remember doing that alot long ago… freaked the hell out of people...
It lost its usefullness when two-sided locking doors were implimented though, lol. Though, every now and then it was fun RP.