I don't understand why you are trolling about this.
Discussing and trolling aren't the same. I have reasons for my opinion and I am open to counter-arguments. The latter so far have been pretty weak, which I guess is why you are telling me I should just drop my point. If you don't want to participate in a discussion about the rules and whether a particular one is right or not, that's fine and your choice. I don't have to follow your personal preference, however.
A zone border being the equivilant of offensive block armor against movement I could see it being reasonable, however it's true, it's not RAW.
If it allowed such things, then I'd say it was worth it. Remember, it would have to allow it for any sort of breath weapon, whether mucus, lightning, acid, or whatever.
The one thing I brought up that you didn't refute is the subtlety in a breath weapon. Sure you can invoke fear in others with guns or violence, but can you startle them with a small fire that (if done cleverly) can't be linked to you? Can you embarrass them by subtly burning bits of their clothes? Can you endear others to you by performing tricks or providing a convenient light (of note on the topic of light I'm assuming that one would use a small fire to light something flammable as opposed to breathing a big ball of flame for light)?
I don't see how it couldn't be linked to you, unless they weren't paying attention. The fire or whatever comes from your body. They'd literally have to not be paying any attention to you to not notice fire coming out of you. Also, you arguments seem very much about fire breath, but Breath Weapon covers anything. As for tricks, you can do that with guns or any number of other skills easily enough. Heck, you can do that just with weapons without spending any refresh. I grant Breath Weapon opens up some maneuvers here and there (that you can do instead of other maneuvers you might instead do), but that sort of thing isn't worth a whole refresh on its own, anymore than having claws you can hide (via human guise) is worth an 2 refresh since you can do maneuvers with it.
As for the size of a fire to start something, doesn't make much of a difference in many situations whether you use a match, breath weapon, incendiary, or magic.
This I don't like thematically as bullets are designed to punch through things rather than stress them, but that's a personal opinion.
I meant you are putting down a spray of bullets kind of like covering fire...they have to watch where they step so they don't get shot.
Anyhow, yes, like any sort of weapon, Breath Weapon opens itself up to some maneuvers (so does Strength for that matter). But comparing Breath Weapon to a Strength upgrade it comes up way short. Comparing it to Claws and they seem pretty similar in power (Breath Weapon might have a small lead, but not a very big one). Overall I think that firmly plants it as a -1 refresh power and hence it is pretty darn expensive. Back to the point of the thread, there's no reason not to allow them to benefit from strength since it is such a weak power (for the cost) to begin with -- doing this keeps Breath Weapon relevant to people with strength powers.