I really want to just go put something under the wheels but I’ve never talked to these people.
Update edit: thank you for all the replies. I went over and knocked but no answer. It’s definitely not chocked. If I see them come home I’ll go back over. I’m worried as soon as the weight shifts loading it that it will just go down the hill.
Maybe something like “Hey neighbor, I noticed your trailer isn’t fully secured, I’ve got some wedges to block the tires if you don’t have anything”
They will never get those wedges back
At least it’s not like they’re particularly expensive. And who knows, if they feel embarrassed enough, they might go out of their way ASAP to get their own to save face.
Scrap 4x4’s or bricks will suffice