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.
This is usually my go to. Come over, friendly and with a solution in hand.
Main point is don’t make them feel less than or dumb for forgetting the blocks lol
Edit: Also, if you can pull off casually welcoming as they’re new.