Picking up after Fido... One campground I frequent has now established a policy.. WE will pick up after your Fido... For a small fee of around 25 dollars a pick. (OUCH)
As to both issues.. You have perhaps heard of something called "Common Courtesy"
Well.. years ago.. Back in the days of of the fictional Matt Dillion (TV/Radio Show Gunsmoke, The radio show starred William Conrad). Well everybody was packing and those who offended... Often ceased to offend, Thus courtesy was common..
But alas, those days are gone, and thus, Common Courtesy, is now rather uncommon.. That said, I've been known to hold a door for someone entering or leaving a building or room or stairwell behind me..