Technically correct, but the lack of a distinct second-person plural in modern English has resulted in the evolution of a number of attempts to replicate it, especially in American English - yourselves, y'all, yinz and so on. If we were still using tou/thee it wouldn't be an issue, but of course language evolves to drop and reacquire forms all the time, so it's only inevitable. Perhaps in a few hundred years we'll have adopted something else equally silly.
Biting the hand that feeds IT
