I live on farmland, and dont clear up after my lot on our land, unless its somewhere any of us are likely to walk.
Wen out in public we DO pick up as much as possible, though ours often run free ahead of us in feilds, so we dont always see it happen .... Gryff is the best though ... we have a river running directly behind our house, and he goes down the bank, and stands facing uphill .... and poops into the river!!!
in our village, there is a massive lack of litter bins .... and there are ( to my knowledge ) only 2 poop bins - nowhere near any routes most dog walkers use ... its been continually raised with the local cpincil - especially as the main route to the primary school is constantly covered with crap ... this morning, I had to side step 5 seperate piles taking my daughter to school - and we are only 600 yards away from the gate!