This user does not put two spaces after a full stop.
A, B, and A and B
This user prefers to use the serial commaonly when its omission can be confusing.
its & it's
This user understands the difference between its and it's. So should you.
its it's
It's really not that hard to use each word in its proper manner.
’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.
This user does not wish to speak or hear dumbass, but is resigned to the necessity of at least understanding it in an environment of massive collaboration.