Am I overreacting?

Yesterday a large van parked on the street outside my house. It had the look of being lived in as a home. Clothes hanging off it. Food and boxes on the dash, etc.

From my desk, I look out a window at my yard and the street (today right at the van). There was a lot of action with at least six young men in and out of the van, moving boxes to the house next door where they appeared to be visiting my new neighbors, opening the side door of the van and napping in the bench seat, etc.

Seeing movement out of the corner of my eye early this afternoon, I looked up from my work. Another young man came out and opened the side door of the van, rummaged around in the back and proceeded to change clothes stripping down to his briefs with the door open. It was clearly exhibitionist since he could have taken the change of clothes into the house or even gone into the back of the van to change where there were no windows. He looked straight at me and grinned when I waved to indicate I could see him, and he did not stop changing.

I’m not a prude and I’ve seen it before, but I kept thinking that I was glad it was summer, because all the neighborhood kids walk past my house on the way to and from the elementary school at the end of the block. There are also several elderly people who take walks in the neighborhood.

If the van comes back, should I do something, and if so what? Call the police? Talk to the neighbor? Approach the van guys?