Really? As much as I realize I'm a pedant a lot of the time, this one is just inexcusable. And I see it so often. Not everyday often, but definitely a couple of times per month. There are no references to other grammatical or dictionary sites required here.
You are not going to "loose it" on that guy who cut you off on your way home. But, I am going to lose it on you if you keep writing it that way.