Linesmen - do you signal your foul?

[mcrowder]

Question for Linesmen and Referees:

Linesmen - when you have a foul, do you signal your foul in to the referee when he looks your way, or do you run it in?

Referees - do you prefer your linesmen signal their fouls to you, or run them in?

Had a referee (not an extremely experienced guy, but one who seems to know what he's doing) jump on me for signaling a foul on defense at the snap. So I watched for this on both Saturday and Sunday. On Saturday, it appeared 4 of 6 crews had their linesmen signaling the foul in most of the time. On Sunday, 2 of 5 were.