I took my horses on a trail ride last weekend, and the trail head is really close to where I live so I decided to break off from my friends and ride into my housing complex. They were really calm on the street since there wasn't any traffic, but I was ponying my retired mare and she decided to take a dump on the road, just in front of the storm drain. Which leads to the ocean. So I told my dad about it since it was right by the house, and he went and cleaned it up for me and put it in his compost bin.
I wanted to make sure it got cleaned up because I want to bring my horses by the house again, so making sure our neighbors have nothing to complain about is important. If it was on streets where I didn't know the people who lived there, I'd probably at least make an effort to dismount and kick it closer to the curb (wearing beat up boots has benefits). Manure breaks down pretty quickly, but not everyone likes it on their car tires.