The names of those in Phase II are posted in the crew room and training center. Not only can JB pilots look through this list and then put in a "good word" on your behalf, they may be able to cast doubt on your selection. I've seen names on the list that I didn't realize had interviewed and went out of my way to say a few extra good words for them.
You had better have proof if you try to put a potential newhire in a "bad light". JB doesn't want to hear about petty stuff. Don't come in and say I heard from a friend, who heard it from someone else that this individaul....
I'm sure it doesn't happen a lot, but if someone gets a few thumbs down from the pilot group, that could be a resaon for rejection. I'm not saying that this happens all the time.
Good luck to those that were not successful this time.