Staying on the trail: I wish someone would tell me how an 80-lb. dog with four soft padded feet and well-trimmed claws is going to leave any impact on the soil or plant life, compared to a 170-lb. hiker with two feet in lug-sole shoes or a 1200-lb. horse with four iron-shod feet.
Waste: I beg to differ on horse p**p--it's strictly ground up grass and within a few hours has dried up and crumbles. Dog p**p, on the other hand, sticks to shoe soles like glue and stinks like human waste. Every dog owner has the responsibility of dealing with his/her dog's p**p. Per wilderness regulations it should be treated just like human waste, buried in a cat hole. I do this for my dog. In return, he carries in his pack the thick tent stake I use as a trowel. On dayhikes on popular trails (Columbia River Gorge, for instance), I bag my dog's waste and pack it out. The worst type of waste found in the backcountry, though, is that of the cow. I can't figure out why, with the same diet as horses, sheep, deer and elk, cows have to put out almost liquid extra-stinky s**t that stays liquid (under a thin dry outer crust) for many weeks. Unfortunately, there are still far too many areas where cattle are permitted to graze on national forest land.
Meeting people: If my dog is off-leash, I put him on leash when we meet people, or at least call him to heel and grab his collar. After almost 6 years of hiking with him, I can tell from observing the body language of passing hikers whether or not they like dogs, and handle the dog accordingly. If they look nervous, I put my dog on leash and get both of us off the trail. If that's not possible, I get over to the left side of the trail so the dog is between me and the edge of the trail and those I meet will have me between them and the dog. Even if other hikes want to pet my dog, I make sure he's fully under my control and does not indulge in the dreaded crotch sniff.
Wildlife: My dog has been pretty well trained not to chase wildlife. He does alert me when they're around, so I actually see more wildlife when he's with me.
Barking: He doesn't bark much, and he stays quiet on command. The one time he did bark quite a bit--definitely in a protective mode--was about 11 pm when some idiots shined their flashlights on my tent. I know the dog suspected something not quite right about them--he normally loves everyone--and when they kept on shining their lights on my tent after I hollered at them, I suspected the same! I was very glad for a vocal dog at that point!
Camping: I try as much as possible to camp well away from the usual locations, because I prefer to be alone. If I do camp near someone else, my dog is tied up so he won't go bother other campers or, worse yet, "go" on a place that might be someone's future campsite.
I'm sorry if you don't like dogs. But if a dog is misbehaving in the wilderness, it's the owner's fault, not the dog's! I hate irresponsible dog owners myself! If they are allowed to run rampant and succeed in having dogs banned, I'll have to stop hiking, because I won't go anywhere without my dog!