So there's a rug store that's been around longer than i've lived where I am, so 15+ years, however, in all my time I think i've only seen ONE couple go in there one time, and I go by it everyday for 15 years. So, I have been thinking that this place secretly is a drug operation, and I was thinking of going in there with a hidden camera and pretend im going in to buy a rug, but talk to him to say that I heard that they sell "'other stuff". So then take video and see his stash, then go out of the store eventually and report to police w/ video.

my brother once went in there a few years ago, and the guy said to get out because kids aren't allowed inside, its suspicious

Have you ever bought a rug? If you mean like Persian rugs, they are very expensive. Thousands of dollars. The stock doesn't need to move very fast in order for them to stay in business.

And I would understand them not wanting kids in there, they can't sell a rug with stains on it.

My MIL was very suspicous of her next door neighbor about 12 years ago.  One day this guy pulls into her driveway and starts asking us questions about the nieghbor.  My husband pointed to the house and got yelled at not to indicate we were talking about those neighors.  He was from teh U.S. Marshalls and the guy was on teh Most Wanted list.  He was a rrested a few days later!

If you suspect something, then call law enforcement and let them do their job.

I guess you don't walk past there at rug buying rush hour.