Don’t you just love it when people use “I” because they sure it must be correct--when “me” is the correct word?
It's called "hypercorrection." A classic example is the phrase "a girl like I," spoken by Lorelei Lee in Anita Loos' Gentlemen Prefer Blondes
The same thing happens when the pronoun "whom" is used in an effort to be correct -- but it's used in
correctly. For example, "Whom shall I say is calling?"
If people would just think in terms of subject and object . . . but they don't.