People who misuse the words quote and quotation. We quote someone--quote is a verb. What we quote is a quotation; quotation is a noun.
People who modify the word unique. They say, this is very unique, somewhat unique, pretty unique. Unique is an absolute. It means unlike anything else. It cannot be modified. OK.
People who misspell the word a lot. It is not alot. It is a lot.
People who misuse the word literally. Literally means that it actually happened. So if you say I literally laughed my ass off you should probably find a doctor.
People who sign their emails with cheers. Unless they are English. If they are English, they are assholes. If they are not English they are wannabee English assholes.