Guys, I just moved to a new apartment, and while it's in a fairly decent part of town, it's still an apartment, y'know? All I've got on the door is a deadbolt, which to my knowledge hasn't been changed since the previous tenants. I'd like to add a layer of protection to the door, one that can't be opened by the maintenance guys or management if they try to enter while I'm home, if I don't hear them (I've requested that they not come in when I'm not at home, but they're idiots). At a previous apartment I once lived in, I came out of the bedroom to find a maintenance man just letting himself inside, no knock or anything. Are these Masterlock security bars any good? I'm pretty sure that I can't add anything permanent to the door, but I am going to request that the deadbolt be changed. How should I secure the door better? Also, how would you secure glass french doors onto the 2nd story balcony (currently only a deadbolt)?