Or wreck picnics, or sh!t where they like, or chase other dogs, or fight other dogs, or bite other dogs, or pish on your bike, or the bus shelter, or the leg of the table outside the cafe, or bark incessantly, or growl at tlh, or stand on their hinds legs and try to lick folk, or run across the road, or whine mournfully when tied to the bin outside the shop, or rummage around your feet in the pub, et cetera, all the while, barring the last two, whilst the hapless owner repeatedly shouts commands in the display of typical mutt-owner futility. Shouldn't be an issue for anyone in a public space.
Most dogs don't obey their owners. Let alone be super obedient to them.