I know the feeling. It would annoy me too when Gunther was smaller and everyone wanted to pet and play because I also did not want an extremely socialized dog. I want a dog that allows who we do and nobody else. but they do grow out of it depending on how much you take them out. At the vet today he wanted nothing to do with the dog trying to come up and say hello. He did let a lady come up to him and touch him a little but he came right back to me. He was polite but not exactly friendly. I actually worry more about him biting in fear than aggression.
Hail Gunther 7-2-2013
If at first you don't succeed, destroy all evidence that you ever tried.
"Some people never end up going crazy...what a truly terrible life they must lead." - Unknown