This user understands the difference between its and it's. So should you.
’s
Thi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.
I speak quite a few languages (the number varies depending on what you consider to be fluency), but living in the Anglosphere has led me to focus more on language issues in English than any other (as evidenced by my userboxes. I suffer from a mild case of Francophobia due to my beliefs that French grammar is too redundant, French vocabulary is neither sufficiently Romantic nor Germanic to be mutually intelligible, and French phonology is too archaic. Ironically, I am a major supporter of French culture and ideals.
Despite having been a Wikipedian for a considerable amount of time, I have contributed far less than most users (particularly ThrashedParanoid, a friend of mine who has created a great deal of maps and flags). Rather, I employ the passive tactic of reading articles and reverting any vandalism I happen to notice.