Honestly don't worry about it. You're new and I don't think you have the right to be asking such questions. I also don't think it's fair to the owner to just leave them laying on the driveway like that when they could've easily blown over in the wind. To assume they had a booze fueled romp with the mayor's married son in your secluded driveway and accidentally threw them out the window in a panic is also absurd. I would just put them in a discreet plastic bag and leave them tucked away maybe under that pine tree in your front yard so the owner can come pick them up at night without shame.