As long as they aren't opening doors, its not the same thing. Security guards are making the rounds in places they know well, they aren't engaging with dangerous situations (e.g. physically confronting a shoplifter at QFC or Fred Myer is a huge no no).

> I'd rather tell people having parties to turn down their music than confront people breaking into places and committing crimes with nothing but a flashlight and a radio.

You only think that a few times before you realize the first situation will sometimes lead to a lot more trouble than the first.