+1 for what Elapid said - language is a "living thing".
(But that doesn't mean you have to like it, I don't).
;-)
But what really p1sses me off, particularly as a "foreigner" living in another country with a difficult language (for me), is the number of times you see/hear English people making what, in my schooldays would have been classed as "schoolboy howlers", worth a detention and 1,000 lines! Some examples off the top of my head:
of and off;
site and sight;
their and there;
weather and whether;
comprises of instead of comprises or consists of;
and MANY more.
As I say, as someone who is not generally speaking his mother tongue "at home" every day it really does grate (grate/great, another one!) with me. I guess that I'm just a boring old pedant (but happily so).
AES