Have an obnoxious friend
whose who's constantly correcting you're your grammar? Well first of all, you totally deserve it. But if you want to get revenge on them anyway, simply abduct their iPhone long enough to change all the texting shortcuts for words like "its," "there," and "your" to their incorrect forms. Then sit back, start a conversation, and prepare to mock them for their sudden drop in grammar proficiency as their head explodes from sheer frustration.