There are at least a couple of large airlines out there that post the names of potential recruits (up for an interview)to the pilot group, or allow pilot's on the line to see who's resumes are in the drawer. Personally, I think it's a great idea, if the recruitment team knows how to vet, which, if they are on the recruitment team, they likely do.
After spending fourteen hours with a guy/gal, then multiple day's in foreign cities, then another fourteen hours back home, it's safe to say that the airline I fly for takes recommendations very seriously; good and bad. So should they. If someone in my company knows that there is a problem with a potential candidate and doesn't speak up, well I would have a very big problem with that. Did they sewer that persons career; I think the person in question was the one who handled that.
I find it a bit off putting in this day and age of CRM, PDM and the like that there is a problem with those who want to make sure their airlines good, or very good in my employers case, culture remains that way. It's like the guy's who know there is a looming problem (immediate or long term)on the flight deck and don't speak up.