We simply do not get many physical security type questions here at all.
The problem I tend to see with physical security questions is that many (most?) of them cannot be answered by the existing community. We just don't have the expertise for it.
If we get "too many" unanswerable questions, even though they are on-topic, then those questions don't add value to the site, and that's what we need to keep to a minimum.
Even though such Qs are theoretically on-topic, people typically intuitively think they are not because they typically associate the phrase information security with digital security only.
Example: This Q which, even though was finally allowed to stay as per the rules, had amassed a fair amount of close votes early on - hinting the close voters were not aware physical security Qs are allowed - hinting people are typically not aware of it. If even regular users did not know this, perhaps potential question-askers or expert question-answerers not yet accustomed to the site won't know this as well!
Thus my proposition is to:
- Make physical security questions off-topic here, but
- Set up a new site:
physicalsecurity.stackexchange.com that will be especially about questions about physical security.
My guess is that the proposed new site would fare much better with such questions than this site because it would be obvious to everyone that it would be about physical security so it would be better able to attract questions about the topic as well as experts able to answer them.
Also the proposed new site would be better able to avoid topic inconsistencies like these:
But the questions have to at least tangentially be related to physically securing information. Design decisions for locks are probably out.
This doesn't seem intuitive - once questions about the purpose of certain parts of locks are allowed, why are design decisions not allowed? Both topics seem just too close to each other for me.
Unlike this site, however, the proposed new site would be able to fully cover the topic of physical security.