In the episode "The Family Gun" there were several locks all up the door but in the next episode they were gone...

wtf?

And if they really wanted protection then they shouldn't locked it whenever somebody went in and out of the apartment. :o

For that matter, why does Willona just barge into the apartment all the time? And it looked like the door was unlocked because they never showed her with keys in her hands!

And Bookman for that matter too! :o