Todd Nasca is not in these productions. He is uncredited- has no lines. He adds them=looks like a real actor. I have most of dvds and was shocked lot of actors make up.
Todd Nasca is Background Extra.
False credits:
CSI Miami
Transporter 2
Stuck On You
Justice
Karen Sisco
Crossing Jordan
Ocean Ave

Each editor is different in how he (or she) handles this data. If he has a trusted source (a press release, for example), he may put the credit in.

Some editors will add the notation "uncredited" to the character name, but others believe this should only be used for major stars who are not credited.

Most actors start their resumes with this type of work, and, if their appearances can be verified, inclusion in the credits here isn't necessarily wrong. It's certainly fodder for the trivia-minded. I think, rather than a blanket post, you'll have more luck dealing with each editor individually. Each show's guide has a contribution list on the right side where the editor is labeled with a crown. PM this person with your concerns and see where it takes you.