Plenty of basis poor airmanship (or groundsmanship?) diplayed at most airfields.
A recent example is when an instructor (I assume) started a Decathlon with it's tail pointed into the hangar here at Goodwood. We were having our Falconar inspected at the time and going through the paperwork, layed out on the wing. You guessed it! Paper everywhere and us having to hold it all down.
Surely that's basic stuff? I was certainly always told not to start up without checking what's going to get blown in the slipstream, and certainly not tail into the hangar!
Then there are the little things like leaving the straps neatly in the cockpit, turning the prop (carefully) to a position it's less likely to cause problems for others in the hangar, wiping the fresh bugs off the leading edge ect ect ... All pretty small in their own right, but they add up to good aviation practice, which is surely what we should all strive for?
SS