My DDs have been attacked many times by "friendly dogs" never by the same dog twice though, but more than once by the same hip and trendy cross breed. It usually starts with the other owner saying "it's ok, he/she is friendly" despite their dog's body language. I have pictures of my dogs playing with puppies, and adult regular and micro breeds that were properly socialized. The DDs have the power to defend themselves, and the intelligence to know when to use it.
This is exactly my experience. If I had a dollar for every time I said “please leash your dog, mine is not friendly when on a leash and meeting a new dog” then to have the other person say “it’s ok, my dog is friendly”....
Que the Tasmanian devil....
I love the deutsch drahthaar but I admit, they require a firm hand and an owner with dog awareness. I also have to keep the cat radar on, because the neighbors cat won’t survive a casual stroll into my yard.