Better Flight-School education.
You know those people on SimplePlanes, who like the tricycle-landing-gear configuration, but put the rear landing-gear on the tips of the wings? I really HATE those kind of noob players. They don't research what a plane looks like, and somehow decide that they're going to put their rear landing-gear on the wing-tip!
Even if I help them correct their mistake as nicely as I can... I turn, and behold, another noob player is doing the same mistake, and I have to help them. How is it possible, that a new player can make the same mistake as other new players, and not know that there are multiple players with this syndrome! The cancerous disease just keeps spreading, and we need an antidote!