A million years ago I was on the air at a public radio station pitching for money late at night, and the phones were dead-- then we got a call from an English teacher who let us know she was not going to pledge any money until "that guy on the air" (not me- the other guy) stopped using the phrase "like I said" and change it to "as I said".... I imagine that even we wordaholics wouldn't go so far as to boycott an enterprise becasue it has made a grammatical error.
Since then I think of her every time I'm on the verge of saying "like I said", or like vs, as generally.