It all comes down to the whole team orders debate. Surely it's against the "spirit" of the sport, but it is supposed to be a team sport after all. Also, I always found it so naive (at best) or pretentious (at worst) to be talking about ethos in modern era sports where millions of $$$ are at stakes..
So here are a few thoughts:
a) It is certainly ridiculous to have team orders a la Ferrari A1 ring with Rubens having to slow down and hand his position to MS. That, is no good.
b) It is also equally ridiculous IMHO to have team mates crashing and wasting an almost certain 1-2 finish 2/3rds into the race. That, is also not good.
c) Introducing rules to prevent team orders is a joke. Teams will always find ways to cheat there if they want to. They can call someone in to the pits for "safety" reasons, they can ask drivers to slow down to save tires or fuel, they can ask them to lower the revs, they can agree even before the start of a race that whoever is in front after the first corner stays in front. The only purpose such rules may serve is to make the whole business less obvious for some crowds or blinded fanboys.
d) For the spectators, of course it is best if team orders are not issued before the last stages of a race. From a "moral" perspective though, this is also a joke: whether issued before the race or on the last lap, team orders are still team orders... you either allow them or you don't. From the point of view of messing about with the results of a race, it is not much different at all to have one of your drivers crash deliberately or have him "save fuel" when his team mate is a few tenths behind and charging with 3 laps to go..
e) Based on all these, the only realistic options to me appear to be either to allow the teams to do whatever they please with their drivers, and let the fans judge them as they will, or have every team run one car only!!! Of course, none of these options appear to be very good for the sport either..

The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. H.P.Lovecraft