The launch of the iPhone on Verizon adds to the mountain of evidence that you just can’t trust wireless carriers.

Wired’s Brian X. Chen has a great piece on why, no matter the magic that flows from Cupertino, and Verizon’s offer of “unlimited data” plans — the Verizon iPhone still sucks.

Why? Because of punitive data policies that treat customers like unruly teenagers rather than honest, bill-paying smartphone lovers.

Chen writes that “any smartphone customer who uses an ‘extraordinary amount of data’ will see a slowdown in their data-transfer speeds for the remainder of a billing cycle.”

It’s one thing if a data hog bent on streaming TV shows and movies during peak hours is slowed down a bit during that time so that others can have a shot at watching old episodes of Arrested Development, too.

But instead, Verizon punishes those users by slowing down their data usage for the remainder of their billing period — which could be up to a month.

Why punish users? There’s no benefit to this behavior other than showing those users who’s boss.

This on top of $350 early-termination fees, the upcoming “bait and switch” of removing unlimited data plans, and the crippling of some phones and crapware mangling of others. Awful.