It's not good to see a team withdrawing from F1, specially when Peter Sauber tried for years to have strong results, tried 3 years with BMW and then, with half an year of bad results, they put it in the trash can.
BMW's image, in my opinion, is damaged at all.
May I remember, BMW suspended their F-BMW school championship at North-America and Asia too. And if they enter DTM, just remember how is that category these days, with cheap false cars, no testing for drivers, just a big fake show...
Let's face it, they are just a bunch of business men, they don't even know what engine is running under their cars' hoods, they don't give a f*ck to motor racing and just didn't made the company profit what the shareholders wanted. That's the difference between BMW, Honda, Audi, and Williams, Sauber, McLaren... for the latter ones, racing is all they know how to do.