Sorry, but while "creepy" was her vernacular, and not "SP" for "suspicious person", it's hard to fault her for trying to protect the neighborhood.
Perhaps she watches all the child abduction shows on the ID channel or Mariska Hargitay's show?
Being that it's not only MA, but Cambridge, MA to boot, he must have really freaked her out.
I seem to remember a young boy was kidnapped in Cambridge (1990s) a la Leopold & Loeb (two gay males), and eventually murdered by stuffing a gasoline soaked rag in his mouth.
Another way of looking at it.
“.... it’s hard to fault her for trying to protect the neighborhood”.
I agree and I’ll tell you why. Twice.... I’ve been somewhere where there were a lot of kids. One was at a mall where all the little ones wait to have their picture taken with Santa. The other was a busy playground. Each time, there was one “lone” guy with a camera taking pictures of little ones. And both times (how do I put this nicely) were obviously “excited” enough you could see it. Use to be in my childhood... the women of the neighborhood (all stay at home moms) would keep a watch out for all the kids. Do something naughty and Mom knew about it as you walked in the door. Have an accident(crash on a bike, for example) and the neighbor lady would drive/walk you home. I would rather someone say something if they think something is wrong (even if proven the person was okay) vs not saying something and tragedy occur.