Totally unhelpful, but... as I've never really had issues with my intact girls being picked on (well, except for Eerie, and she's just a jackass with horrible social skills around dogs she doesn't know well...), you guys have really turned me off from having intact males
Mine has been perfectly fine. No, I don't let him interact with dogs I don't know (moreso, owner's I don't trust), but intact dogs aren't bad.
You just take the same precautions as you would with an intact female, basically.
IMO, there is no reason why a dog should be picked on in the first place unless he's going around a place with loose dogs (like a dog park, day care, etc) - even then if the dog is loose they need to be under voice control, IMO, for example in training classes, agility trials, shows, hunting, herding trials, etc where dogs are off leash. If you choose to put your intact male in a doggie day care situation, then I see how that would be asking for trouble, same as a dog park. (neither of which I recommend you doing with an intact male) But it's a totally avoidable situation. It's just part of having an intact animal, it's not a bad thing.
It's the owners responsiblity to keep their dog away from mine, if mine is with me and not bothering the another dog. My dog doesn't need to meet your dog. You need to keep your dog under control and/or with you. I have no desire to meet your dog. (general "you" there, that's not directed at anyone. lol)