Where do you keep the high-end markers in your newsagency?

I was in a newsagency recently where they kept a selection of high-end markers behind the counter including the ones in the photo. I asked if this was to protect against theft. Their response that it was to stop people coming in an sniffing them for a high.

Is this a thing? Are there people coming into your newsagency to sniff markers to get a rush or a high?

I remember it happening many ago but have not heard of it recently. Hence the question. I would love to hear from others on this.

I can understand being careful about product placement to protect against theft of these markers as I can imagine they would be popular with taggers, but not for sniffing in-store.

And for the record, the newsagency in question is in a capital city serving a broad range of people, not specific demographic.