Yes, a "reporter" who is well known for heavily editing video to misrepresent the facts and/or fabricate his own. It is perfectly valid to disregard such a person.
Downvote me all you want, the evidence of James O'Keefe being a dishonest reporter is out there for people to readily review. The person he is interviewing might be 100% correct but his message is tainted by sharing it via an unrepentant liar.