Part of the problem is nothing is in black and white, most of it is gray and left up to the interpretation of the management at all the individual airports. Private sector had hoped that when the Feds took over this gray area would disappear but it didn't it just got bigger. Everything is left up to the common sense of the people working and we all know how that works. That is why you have the inconsistencies. Look at some of the airports that have been mentioned, when it comes to common sense there is a lack of it. As for items being stolen because bags are left unlocked, this has been going on for years and 99% of the time it is found to be ramp agents not security personnel.