Being told to, "Buy Sightstone," is super annoying...

... especially when I've already bought my choice of the "Eye of the <insert name here>" line. For real; if you're going to complain about your support not having a specific item, could you at least have the decency to check if your support has already bought the better version of your request?

Fellow players: please share an experience of when a teammate told you to do something even though a) you had already done that or b) they simply lacked the game knowledge to know what you were doing.