Originally Posted by Beckles

While I wouldn't say it's a rule, it's pretty much standard practice on WN that non-working crew helps with handing out snacks, including pilots. The last pilot I had doing this I told him he was doing a good job and maybe he would get promoted to flight attendant soon.

On a recent WN flight an Air Midwest F/A riding to MCI helped with the snacks and the WN F/A made a point of thanking her on the PA after we landed.

I could very easily see this happening on WN, and I'm almost sure I have seen it at least once. WN is a little different since they don't use a cart though.