This user recognizes that even if 300,000,000 people make the same mistake, it's still a mistake.
"There's" with a plural subject
This user knows that "there's" with a plural subject is a pervasive grammatical error. There'sThere are too many people making this mistake. Don't be one of them.
…in.
Ending a sentence with a preposition is something that this user is okay with.
than then
This user understands the difference between using "than" and "then."
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!
your you're
This user thinks that if your grammar is incorrect, then you're in need of help.
its & it's
This user understands the difference between its and it's. So should you.
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.
’s
This user understands that apostrophe's apostrophes are for possession and contraction, not pluralization.
,
This user's favorite punctuation is commas, guys, not exclamation points or whatever.