I was also inclined to not let strangers pet my GSD's. However, what I felt was a very good thread on this board (please don't ask me to find it) changed my mind.
Another member posted that one day there would very well come a time when I would need that my dog is approachable by strangers. For example, what if I were alone and became suddenly ill (heart attack, etc.) and had to dial 911. My dogs are such that a stranger could come into my home without being attacked, unless they came in an overtly hostile manner. But if my dogs hadn't been socialized and trained and if their temperment were different, I don't know that the paramedics could get through the door.
Additionally, I believe that for most people it's virtually inevitable that at some time or another their dog is going to be in a situation where it's going to need to be stable and sociable enough NOT to bite someone. Try as one might, the situation sooner or later arises.
For a family companion and/or protection dog my feeling is the dog should be very well socialized and that means people petting your dog. But that doesn't mean everybody and their brother does so. A person's actions, not just their mere presence, determine whether or not they are a threat. Your dog should be socialized and trained so that it learns to recognize the difference.
You said that you didn't plan on training your dog in bitework. I'm no expert, by a long shot, so please DO NOT take my word for this. My advice to you is to have someone evaulate your dog to determine if it has the nerves and temperment to be a Personal Protection Dog (PPD). If you are told your dog does NOT have the proper demeanor to do this then I would agree that your dog should be only a "pet".
But, if your dog has the ability to be a proper PPD then perhaps you should consider it. The reason being is that IF your dog has it in him to do the work then you can work with him to teach him when to bite and, most importantly, when not to. Eventually (hopefully) your dog would graduate to the level where a decoy could approach you in a belligerent manner (like an obnoxious drunk begging you for money in a park, for example) and without even looking at your dog (but communicating with him nonetheless) your dog would learn to accept this hostile, loud and threatening man WITHOUT biting. When you're at that level then you can feel fairly confident that your dog is not going to bite someone.
Rather than trying to shut down what is naturally there, instead try to bring it out, work with and control it. Someone said not to work against mother nature. That makes sense to me.
But again, I'm just a working dog enthusiast. I'm not a trainer or an expert, just another yahoo with an opinion. And you know what opinions are like. LOL! Hey Will, if I totally screwed it up just tell me to shut the hell up already and I'll slither out of this thread. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
Patrick Murray