I'd be livid if this happened to us.
Many of us have spent a lifetime doing our best to be courteous and respectful of others.
I honestly think this apparent discourtesy we often see is a slap in the face to a lot of folks.
Most would never take advantage or at least ask first.
I say if you do something to make me mad then you need me to say something that will piss you off too.
Time to hunt that owner down and get them to move on.
Don't let them do it to you without forcing them to realize it way overstepped on your good time.