I get why youāre saying that since it was Xitted at/tagged Bank of America. But it was still a public post from the userās account. Thatās like assuming a company could delete one of your emails or your Facebook post.
I never used twitter but I guess the best you can do is make it not appear on your wall but the tweet still exists.
Tweets from other people donāt ever appear on your wall. They only appear on that userās profile page, or on the home page of users who follow that user. Or, the third way it can show up is attached to another post that replies to it.
So ironically, by replying and telling the user to remove their personal information, BoA has actually ensured more people are able to see that userās personal information.