I hear ya Joel..
It was once, parked in an area I would have normally avoided, but it happened. Taking the keys isn't a problem with the Honda. I go thru the towing start up, shift the gears, and leave it running while I do the departure walk around anyway. It is the only pain about the Honda, every 200 miles it should be done...
Besides, taking the keys equalizes the threat of theft. If a thief wants it, they will take it. The insurance covers it and it is over 160K rolling miles... Maybe I should leave the keys in it....