The thermal barrier isn't a brick wall anyway. It's more like a screen door. When the buggers ping you they still get an echo, just slightly offset from where it should be. But they still maintain contact. And if they hear you above the layer, they most likely still hear you below it.
It's a worthwhile thing, as it makes tracking you a little harder and every bit helps when you have an elite above you, but the thermal barrier is not the end of your problems with the guard dogs up there.
Just trying to be encouraging!
