Actually, it's is showing abbreviation since it's is a shortened form of it and is. Its is correct because its is possessive just like his and hers are possessive without the apostrophe.
Nobody thinks that you're an asshole. Well... maybe SOME people, but I think that the S.G.P.D. are desperately needed in this topsy-turvy virtual world of spelling and grammar mistakes, and we're all thankful that you're around. A loud minority of people will squawk and moan about people who point o...