Yes, i did the same thing with my surface pro 3 when i wanted to do some drawing. The palm detection thing works only if the pen is close to the screen and when I’m focussed on something, i forget to pay attention to that (and thus get all kinds of ugly palm artifcats on my work).
Interesting idea, but then you lose the ability to drag the screen around with your fingers, or pinch to zoom. Presume if you could use the touchpad or an external mouse instead? This is where the BT keyboard would come in handy!