Seriously, retractable pogo sticks are not such a bad idea...

After a few contest crashes in the early 2000s involving full water, cross-downwind, high heat, high altitude takeoffs, and ineffective wing-runs it occurred to a number of pilots that the concept "run the wingtip" started in KA6s, and sooner or later there is a limit. There was a lot of discussion about ATVs, roller blades, launch devices, but perhaps that was over beers on rest days. In any case it didn't go anywhere.

Retractable pogo sticks or wing wheels would pretty much eliminate wing drop on takeoff crashes, ground loops, etc. And on landing too.

John Cochrane