And therein lies the problem.....
What construes "stabbing your fellow pilots in the back" is up to interpretation.....
Well, let me take a crack at it.
When an airlines opens a new certificate expressly to get around the CBA of the original pilot group and another pilot takes a job with the new company while the original group is fighting..... I think that pretty much covers this sort of "stabbing your fellow pilots in the back."
There certainly are others but I believe this is the most pervasive and most easily stopped. The "lowering of the bar" does not fall here. It only opens you up to ridicule from other groups.