If they don't pick up their shit?
This has probably been done to death but it seriously enrages me so much when I see big piles of shit on the ground or someone walking away after their dog has taken a massive dump somewhere.
Yesterday I only realised I stood in some after the buckle of my baby's sling touched my shoe and I could smell it when putting her into it. Had to spend ages cleaning it and my shoe, plus the pedals in my car
Fucking horrible.