Totally unacceptable I'm a dog owner and always clean up after her. I find it particularly bad in Spain where they let the dogs crap everywhere and I've never seen anyone clean it up.
That one is really annoying - I get fed up of picking up cat **** in our garden -we dont have a cat but several of our neighbours do and seem to think ours is a great place to use as a litter tray. We do have lots of dogs walk past our house and along the footpaths nearby and generally the owners are very good - though I am also baffled by the fact that some pick up but then leave the bags instead of finding a bin. There are lots of bins round us as well - we used to look after a friends dog several times a year and never had far to walk to a bin after picking up.
About 3 years ago I asked politely a chap whose dog was crapping on a kids play area and did not look like picking it up, ' I hope you are going to pick that up'. He then flew into a rage and attacked me with language that kids should not hear. Oh I when I rang 999 they said could I run away as all their officers were attending a major incident! £1000 find you are having a laugh!