[myst]

i only know that if I see a dog muzzled it is because the owners were ordered to muzzle. the dog has been deemed vicious by the way. if your dog is fine with others and people just walk:) you should not be afraid of anyone as you have a fine, well-behaved dog.
some people just are not dog people and some just need a little nudge to pet your dog and learn how nice rotties can be.
also there is Rally-O, OB, and agility to play with.
don't forget to smile and say hi to everyone you meet on walks.