Dog owners who take their dogs for walks and let their dogs poop on sidewalks but don't clean it up... STOP IT, YOU INCONSIDERATE ASSHOLES! Do you personally enjoy stepping in dog shit? Probably not. Walking a minefield of canine turds is not fun for anyone, and getting it all over one's shoes is a lot less pleasant that CARRYING A FRIGGIN' PLASTIC BAG AND PICKING UP AFTER YOUR STUPID PET!!!
What is wrong with you? It is laziness? Is it the nasty idea of picking up and carrying the feces of the mutt you absolutely had to have despite your unwillingness to assume the responsibilities that come with getting a pet?
Or are you so enamoured with the flea-ridden mongrel that you think the crap smells like roses and will love it as much as you love your little pooch? Newsflash - we don't.
Whatever's the case, there's something wrong going on inside your head. You definitely lack the most basic of decent behaviour to fully integrate into civilized society.
Harsh, perhaps, but you're the one who's not cleaning up after your friggin' dog, asshole.