theyThis user considers singular they standard, modern, informal English usage, so avoids it on Wikipedia.
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.
which & thatThis user knows how to use which and that correctly.
less & fewerThis user understands the difference between less & fewer.
’sThi'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.
USage declineThis user uses American English, but is appalled at its rapid and continuing deterioration.


This user is an expert in
music theory.
This user might or might not have an academic degree, and considers the distinction irrelevant on Wikipedia.
Majority ≠ right This user recognizes that even if 300,000,000 people make the same mistake, it's still a mistake.