You know what I'm gonna do?
I'm going to launch a very large missile at the supposed location of the ice wall, at a part that is cruicial to the containment of the ocean.
Now, even with 2000 something guards on snowmobiles (assuming they have enough fuel to power those snowmobiles year round), there's no way they could stop a nuclear attack on said ice wall.
If the oceans drain, and the ecosystem fails, and we all die, I'll admit I was wrong.
Wait a second... If your flat earth theory is true, and so is global warming, then we're all fucked anyway.