While I realize you said you weren't taking pictures.
Go to about any gunshop and make it look like your taking pictures and see how fast they run you off.
The owners,employees and any customers in there won't like it unless you get permission first.
I had a gunshop for 20 years and the only time a customer came in and asked to take some pictures of a couple guns I got burgled a couple weeks later.
Some burglars take photos of mechandise and get customers before they break in. that way they know how much they are going to get and where to take it so they don't have to hold it.
Back in the late 70's -early 80's there was a couple that did that to a bunch of Tulsa antique shops before they finally got caught.
Go to most any Gun Show and start snapping pictures and see how fast your escorted out.