This is starting be very widespread and it is embarassing because the primary cause is a vague idea that it is "more educated" to say "I" than "me", which of course backfires horribly when you reveal publicly the fact that you don't know that "I" should only be used as the subject of the sentence.
...linguists Rodney Huddleston and Geoffrey K. Pullum claim that utterances such as "They invited Sandy and I" are "heard constantly in the conversation of people whose status as speakers of Standard English is clear"; and that "Those who condemn it simply assume that the case of a pronoun in a coordination must be the same as when it stands alone. Actual usage is in conflict with this assumption."
It may take me some time to calm down after reading that.
