I'm 53, a Brit and the son of two soldiers.
I went to several BFES (British Forces Education Services) schools in West Germany, back in the day. You may recall that things were quite fraught back then - different to today but also the same. We used to get bomb threats roughly weekly - just at school, it was worse for the troops. Some of those were traced to older kids having a laugh. (lol)
In about 10 years (roughly late '70s to mid '80s) quite a lot happened. I was 10 in 1980.
Anyway, govt agencies have to deal with quite a lot of crap that you never even hear about. Its quite hard to discern whether you have a murderous maniac on the blower or a kiddie trying to impress a girl or whatever.
I was roughly seven or eight years old when my Dad showed me how to look for impromptu devices on the chassis of a car. My brother is a year younger. We would always check after parking our car. That was the times.
Nowadays are different but we should perhaps re-allow the old norms to come back in and start to check our cars again, when it might be appropriate and be a little more observant about what is happening around us.
Your threat model might be more biased towards firearms, if you are US based, for example. Avoid them if you can!