Exactly. I think there are several other equally plausible explanations as to why this particular McDonald's would have security to prevent video surveillance.

It is also next to a number of the finest luxury retailers in the world...

... customers of which are highly unlikely to ever wander into a McDonalds, regardless of its location.

I was actually suggesting they were protecting the neighbors from a potential highly sophisticated criminal mastermind casing the joint to conduct an Ocean's 11 style vault heist of the property next door by drilling through the wall, but I didn't know how to communicate that ;)

I agree. Rich folks don't go to McDonalds too often. However in Europe the brand is perceived a bit differently

The US middle to upper class generally seems to look down at McDonalds as being a place where the poor, fat, or simply lazy go to eat. That's just not the case in other countries.

I can only speak for Paris and Tokyo, and the very upper class may not eat there, but nobody else has a problem with it. It's not just American tourists keeping them in business.

You are taking it out of context. Point being that no celebrity worthy of videotaping would ever be spotted at McDonalds. So their crackdown on video cameras is unrelated to the proximity to the luxury shopping area.

If a customer was treated like this in an Apple store, you wouldn't call it a front, but it would be really strange. If a customer was treated this way in an Apple store, and Apple franchised their stores, and the owner of the franchise controlled the staffing, the argument would be valid. Apple and McDonald's can't really be compared the same way in the context of Paul's suggestion.