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.
Why wouldn’t you? I suppose they would be thankful because you show considerations about their stuff and wellbeing. Some wooden blocks in front of the weels should probably be enough.