What they are looking for is balance between realistic flexibility and safety compliance.

They don't want to work with an inflexible nazi who would do this kind of stuff:
- Report a drunk (or even an 8 hour violation) directly to TSA, company, FAA.
- Report a CA who doesn't wear his shoulder harness for taxi.
- Grab controls at the first sign of altitude violation.


They don't want a pilot who is spineless enough to allow these sorts of things to occur:
- Flammable drunk crewmember working a flight
- Turn a blind eye to a captain who cruises on the verge of stall to increase block time.
- Allow a CA to conduct homemade CAT II VOR approaches

Good ways to deal with these scenarios:
Drunk CA (or CA who drank WAY past 8 hours): Tell him at the hotel that he needs to call in sick today and refer himself to the union or company substance abuse program (you will verify that he does this). If he refuses, threaten to call the CP, at which point he WILL comply.
Serious Rule Violation: Don't alllow this to occur if possible, but don't fight the guy for the controls. Contact the union pro-standards committe after the fact.
Busting Mins: Alert the CA, if he continues below mins call "Missed Approach" and report the missed to ATC! ...once that goes on tape he really has no choice. If he is non-responsive, take the controls, but don't fight him for the controls unless he is mentally non-functional. Usually the go-around call does the trick.