I have to add a cautionary note here.

I work in a mall, and one day a customer came into my store (it's right inside the entrance) and told me to call mall security b/c "some kids [were] smoking marijuana in the parking lot!!!"

I, of course, had to suppress the urge to say, "Good for them!"

Instead, I told her I would call. She waited for me to make the call, like right in front of her, but I just kept stalling like, "Don't worry, I'll take care of it. Okay. Thanks for reporting it."

She left. I waited like ten minutes and then called, cause I felt kinda obligated to do so. I figured if they hadn't finished up by then, they deserved whatever they got for being stupid enough to sit in the middle of a mall parking lot in broad daylight smoking.

Soooo just wanna say a busy parking lot isn't necessarily the best thing either. Not a bad choice but I'd seek privacy if it were me.