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.
I’m not sure I understand that
People don’t like being told they’re wrong. Especially on their own stuff. Kind suggestions to a neighbor will go better than just unsolicited blocking their trailer. Imagine them hitching up within hours of this picture being taken, start to drive off and then damage their trailer coming off makeshift blocks that you so graciously put there without their consent.