I knew alot about the controls and stuff because I watched minecraft before I got the game. I think the stupidest noobie thing I have ever done is probably forgetting where my house was and I didn't know what coordinates were so I just deleted the world xD
that's one. another was when I was on a PVP server,you got permission to get into creative and get a shitload of diamond stuff. basically,I was wondering why the armor was purplish. My friend said that they "enchanted it" and I was like, what? Then I walked in there with Pro 1 and Sharp 1. Then he said that you need to put bookshelves around it to get better enchants...lol