I had found Wikipedia in several searches for various topics of interest without ever really knowing what it was. One day I noticed the "edit this page" tab and thought for sure that I had some how found a hacked site that was giving everyone access to edit the site. That's when I did a little more looking and discovered the wiki concept.
This user understands the difference between its and it's. So should you.
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
to too two
This user thinks that too many people have no idea how to use words that they should have learned in grade two.
your you're
This user thinks that if your grammar is incorrect, then you're in need of help.
’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.