I am a dog owner but I do agree with you Johno! Also agree with NannaandGrampy we don't take our dog shopping or into cafes. There are times when we go out and she doesn't! If I say to her "Just popping out", she goes to her bed.
Dogs running up to people are a problem, I also have problems with other dogs running up to my dog as she is a rescue (Battersea dog, found as a stray on the streets of London) she is anxious and is reactive on the lead to other dogs. So many dog owners just call out to me "Oh he's friendly" and are unable to call their dog back. I have a bright yellow lead banner stating that she is anxious - ignored by many other dog owners.
My other issue with dog owners that is getting increasingly more common is bagging up their dog waste and leaving it at the side of the footpath or hanging it in the hedgerow. Why??? This happens so often in the country park near our home, there is a dog bin 200 yards from the car park!