Come on guys. The troll is click-baiting for professionals!
What one puts into a Kollsman window has no effect on SSR displays. Transponders transmit pressure altitude and ATC computers apply a QNH correction.
For extra excitement, fly on 1013 at all times and level out at a mentally-calculated pressure-corrected altitude when below transition. See if anyone notices.
Last edited by Oktas8; 18th Feb 2014 at 06:18.