You're free not to use it. If that opt-in isn't enough, exactly how many levels do you want? If you do choose to use a free service, whether it's Facebook or a public library, you have to consider how it's paid for. Actively using something and also actively undermining its means of support ... well, I'll just leave that thought there.
> You mean you care about something, but you just won't do something about it
You seem to have some pretty unrealistic expectations of what individual employees can do at a 30K-person company, or about anyone taking the right action without deliberating first.
> Why do people need to "collaborate" on solutions? What do they get from it?
Ummm ... the solutions, which are not only applicable to Facebook? This is a general problem faced by many companies. The solutions could also be useful to the people who blather about creating a distributed alternative to Facebook. I've been a member of the decentralization and distributed-system community for far longer than Facebook or Y Combinator have existed. I also know something about the scale and connectedness of the data at Facebook. We're multiple basic innovations away from being able to create such an alternative. Wouldn't it be nice if people who actually understand various parts of this can talk and work together? That doesn't become more likely when every discussion is filled with people who only read others' comments enough to find where to insert their own half-baked opinions or insults.