Originally Posted by
john-stirling:
“I agree completely 
It also bugs me when people put "to" instead of "too" and "too" instead of "to" 
Oh and "its" instead of "it's", think I'll stop there lol i could go on all night
”
But it's is always short for it is
Its meaning 'belonging to it' has no apostrophe. It is a possessive pronoun like his.
One of mine (most of the others have been mentioned)
is 'here here' instead of hear hear. I always want to post where? where?