I'm also push button, ignition switches, and no key. I don't lock the canopy either. If someone wants to steal my radios, I'm hoping they gently open the canopy instead of smash it. It's easier to replace electronics than the canopy.
At my home airport the plane is in a locked hangar. When I'm away, I just use my canopy cover.
RV-8a Built, Enjoyed, Sold
Two Kids: Built, Enjoying
RV-10, Bought, Rebuilt, Enjoying
Build / First Flight Video: http://www.youtube.com/watch?v=8f9HXzZT1dE
Arguing on the internet is like having a competition to see who can hit a brick wall the hardest. You may win, but you're still an idiot.