I am a responsible dog owner. My dog never messes on pavements, only grass and I always pick it up. I can't comment on the letting off the lead bit because Ollie is a lakeland terrier and a bit mental upstairs so I would never let him off the lead for fear I lost him.
As for my car it does not smell like a womans toilet so you can't put all dog owners in room 101.That would be like me saying put all bird watchers in room 101 because they are manky looking old men with nothing better to do. Now that doesn't apply to you bounty so do you follow my point?