Maule Driver wrote:
I don't. It stays on 24/7 (you know what I mean). 1200 unless given a
code. It effectively prevents "Maule, check your transponder" unless
using the wrong code.

Not a terrible idea. If the tower doesn't like it they can say so.

Personally, I turn it on at engine runup -- never on the runway. If I
forgot to turn it on, I don't think reaching over and switching it
would be a distraction. But then, I fly enough that I don't have to
look or even think about the transponder switch.

Some transponders have a 'ground' mode. The Garmin G-1000 turns its
transponder on and off automatically.