This post makes me laugh about the stupidity of people and what they think they can do. I totally agree that it's really rude to touch anyone's dog without asking. The worst thing I ever experienced was when an older woman came up to my daughter when she was seven months; she asked how many teeth she had and then instantly put her hands in her mouth to check!
I was completely stunned and just quickly walked away with my daughter - I don't put anything past people now and only wished I had given her a good response but I was too freaked out!