Not sure what you are implying here since most Line Checks are last minute and usually a surprise. I fail to make the correlation of how pilot members discreetly policing each other relates to a standard company line check???

Perhaps you are suggesting that a Line Check Airman should deliberately fail or give an unsatisfactory report to a pilot during a line check as a form of punishment.

Let see if you feel the same way about that after a Check Airman, who may not like you personally, decides to abuse his/her power and fail YOU on a Line Check.

If this is what you are implying, and I think it is, it speaks volumes about you as a person with regards to integrity, professionalism, and maturity.