Welcome to the internet. First I shall explain why this logic works on the internet, in mathematical terms of course.
speed = s
time to type = t
winner = w
your = a
you're = b
a > b
s > b
s=a
w = s + t
We are all looking to for the quickest way to do anything, so therefore, we want to = "s". "a" is also greater than "b", so as internet users, we always want to be greater. So why use "b" if "a" is both faster and greater than "b"? Therefore, we use "a" in all instances where b could be used. We all want to be winners, so in the equation w=s+t, we can substitute "a" in because "a" = "s". By using "a" we can be the winners, while "b" we are not. So therefore, by the associative property, by using "a" we are the winners, and by using "b" your not. Since by using "b", you are not the winner, we can only determine that by not being the winner, you are thus, in fact the losers. And since Grammar Nazi's use "b" we can use the associative property to conclude that they too, are losers. Hint: Nothing is correct on the Internet, so correctness will play no part in this equation.
P.S. Since I, in fact, used "your" where grammar nazis would have used "you're" I = winner.
EDIT: This is a joke. I could care less if people use your or you're. Our brains are able to make sense of it either way, and this is the internet. I do not expect high standards.