Food for thought . . .
More food for thought: I looked into the german manual of the Pa28 Arrow (the officially translated one that comes with the aircraft when you buy it). It says "fullest tank" before starting the engine. And then nothing (apart from "switch tanks every 30 minutes in flight"). Nor do all the checklists I have ever seen for various Pa28s that I have flown over the last twenty years. Myself, I never did that switching of tanks on the ground nor have I ever heard of anyone doing it.
Now it would be interesting to compare the singe-tank-fuel-starvation related accident statistics between german and UK Pa28s...