Facebook provides a service people find genuinely useful, or they probably wouldn't keep using it.

Their business motives don't seem much different from other large businesses, and their impact on consumer interests seem minimal (e.g. compare them to Target's accidental pregnancy revelations – which is worse?)

The are pushing society in new and interesting directions on privacy, but I don't think that is necessarily a bad thing, nor is it their fault (e.g. the invention of personal cars changed society a lot, positively and negatively, but no-one blames car companies.)

On the substantive point, when you see the number of credential leaks and account hijackings out there, maybe telling most developers "You're too busy and inexperienced to handle this well; we have many well paid experts working on this" is a good thing.