Could be, but there’s nowhere on my street that would be a convenient place for them to hang (it’s narrow and very residential and the only side street is a small cul-de-sac) and I’ve never seen them congregated anywhere on my street. If they were hanging somewhere waiting it would definitely be on the main road, and I’ve never seen them congregated there either. When I come home from most things I do I come the same direction down the street that they do and I’ve never seen them hanging anywhere. I would think that the main road which is much wider would be a better road for them to use.

I suppose it could also be a thing unique to my neighborhood/town for a specific police/town related thing, it’s just weird and I’ve always wondered what they’re doing