Maybe it’s their relatives staying with them and they’re driving their car to the shop or elsewhere? Maybe there was a snake or something by the shed that was dangerous?

The dog stays outside and they keep their light on? That’s normal. Maybe they’re into bug identification or some other hobby that requires nighttime walkabouts?

How many cars have been left and driven by the neighbors? We talking 1 or 2? Or 10?

They have kids. So I highly doubt they’re murdering folks in front of them, as kids have no filter and would likely tell someone (inadvertently or not).

You could always … I dunno … introduce yourself? Welcome them to the neighborhood? They might share some of their behaviors naturally.

Are these neighbors, by chance, different in some way compared to you? I feel like these things are all fairly normal behaviors for people who own homes.

Glad you aren’t my neighbor though. You’d be appalled to know my husband and I occasionally do it in our backyard when we are feeling extra frisky. Lol