This is not surprising. I am sure others are also. My policy for the last couple of years has been to say “yes” to all Facebook friend requests, unless they are a known sociopath etc.
I used to only say yes to people I actually knew, but the hassle of trying to recall had I met someone or not, and potentially offending them by saying no got to much, so I went for an automatic yes policy.
In an ideal world I’d set up a second account, and restrict it to close friends only. Might do that, when I have the time.