Mine is people using are instead of our. I hear this all the time from social media, news reporters, and I see in in writing. Instead of our, they use are as if they forgot the word our exists.
People at work wants me to do something and using phrasing, like "can we check this?" , "we must do xy quickly". What do you mean WE? If you want me to do something personally just fucking say it MF! It makes my blood boil.