What SKILL build are you gonna do?

Well, that changes everything.. ;D

Maybe not. I don't think Blitz is saying that if you hotkey it, the double-tap doesn't activate it as well.

If that's what he IS saying, then yes, that changes everything and I would definitely include Dash in my Infighter build.

However, I think he's just saying that you can hotkey the ability as well which gives you two options for activating it, but still leaves the original problem of accidentally activating it with the arrow keys.

Waste of MP? Not really, you must be jew if you worry about wasting MP.

Beyond the borderline anti-semitism of your comment, which really doesn't belong here, you've got to be a true noob not to be worried about spending as much MP on a lvl 1 skill by accident as you would for a maxed lvl of any other skill in the same job. Especially in a class like Pirates which will deplete their MP faster than almost any other class will.

Plus, by activating it when you don't want to it could cost you in terms of other resources beyond just the MP as you lose some control over your now boosted character and mis-time a jump, run through a lava/gas vent too early, rush an enemy too quickly to get the attack in before you take bump damage, etc.

Funded or not, good resource management and character control is something any intelligent Mapler is concerned with which is why there is so much concern over the activation mechanism of Dash.

If Teleport worked on the same activation mechanism, I can guarantee that most mages would NOT put their first point into Teleport at lvl 30 and many wouldn't begin to put any points into it until they had saved almost half the SP to max it, because even for a class which regenerates MP by breathing the wasted cost and control associated with accidentally activating it would be detrimental to the overall training schemes of the class.