Still, being able to relock a pickable door isn't really any different than being able to relock a door that you have the key for. As for the unfair to AI argument, you could argue that even having a set a lockpicks to begin with is an unfair advantage over the less equipped AI. Don't forget that most FM designers choose to only allow you pick a handful of the locked doors in a level, making most not even pickable in the first place. Great, now I have the T2 "unpickable lock" sound stuck in my head. Click click. Click click.