People who use the wrong homophone, like “incite” instead of “insight.”I find self indulgent ignorance really annoying. You know the people that come into a thread/conversation, immediately make an erroneous statement of fact, then go on to expound their "incites" on said topic while claiming everyone else is wrong, refusing to give sources while claiming any counter sources are unreliable.
The Punctuation Nazi’s strike again!People who put apostrophes where they aren't needed.
"Which of these photo's do you like the best?"
I think I could included in Sojourner's pet peeve. Though I have gotten better, I give links now.