If I'm traveling in uniform AND the guys aren't busy I let them know that I'm on a ticket. I do this as a courtesy so they or the FA(s) don't think I am JS and not checking in.

In my previous incarnation as a regional pilot I had several jumpseaters who didn't check in and I would have no idea, this included pilots from my own company! I personally would rather err on the side of letting the guys doing the driving know what is going on than **** somebody off.

My $ .02, YMMV.

BBF