[Kizzy]

I can't see the relevance of your comparisons tbh, nobody is suggesting you live in a state of perpetual fear at all and listening to your rant I feel you're more affected than you like to admit.
If you worked in B&Q and someone bought several boxes of 6in nails and nothing else.

If you worked in a hairdressing suppliers and someone bought copious amounts of hydrogen peroxide and nothing else.

If you worked in an airport and someone was taking pictures of the entrance/exit points or security cameras.

Being aware is not the same as being fearful.