I remember quite a few years ago when I once went into OSM and fixed some streets in Las Vegas by "unbraiding" the intersections, in other words converting intersections with ways that joined at one point to ways that joined in a tic-tac-toe pattern. I believe this was considered best practice at the time in OSM. Well, a few days later, I got a very angry private message from some guy complaining that I edited "his" nicely braided roads and demanding that I revert the edit. I was kind of a newbie at the time so I did what he said and stopped editing for a while.

I've since gotten back into editing here and there, but the initial experience likely prevented me from really getting into OSM and becoming some kind of editing master.