Dude. A most 'correct' reply!
You have some pre-conceived ideas about the security industry. I dare say that at a lot of places, rules are made to be kept. But you have to understand that at our mall, security guards are the lowest of the low. I just finished a chapter for my book entitled 'Mall War II'.
It describes an incident in which a mall cop, my colleague, was fired. For what you ask? He came across a gang of teenagers ransacking the department store and tried to stop them. Turned out that it was a cosmetic sales girl who roped in outsiders to help search for a lost mobile phone. They did not identify themselves to my colleague so he called for backup (a store manager and another mall cop).
And when management found out that a mall cop 'bothered' one of the top salesperson at the store, they fired him without even reading our report. Even though the duty manager that night would say 'yeah she was in the store after hours, and dumping drawers onto the floor'.
Now you want to tell me *I*, a mall cop, am creating an environment in which other rules will be viewed as 'breakable'?
Dude. I don't want to sound like a broken record, but you should really read my book. Amongst the funny stories about my work, I also do an expose of the industry.
A Mall Cop
If the sceario were real:
By not reporting them you are complicit in a fraud on the boutique in question.
It is appropriate that the security service be remote from the employees. The majority of theft/fraud in the retail trade is perpetrated by employees.
In addition, by not enforcing the mall regulations vis-a-vis the staff entrance, you are creating an environment in which other rules will be viewed as "breakable" without penalty.