I own some of their stock and I keep buying more. Reason: FB is doing a great job with advertising and they are not just Facebook but also Instagram and other things.

Counterpoint: Facebook is taking your invested money and doing terrible things with it. Why fund that?

It's priced in.

/s of course, but maybe people really don't care because FB has been in so many of these types of controversies?

They are subsidized. Stock may not be best indication of the performance of the company.

That’s the problem with free ad-based media giants. For an individual, the deadly combination of the platform being large enough, free and closed (no APIs for feature-complete third-party cross-platform clients) means a huge barrier to switching over to a different social provider with better ethical, infosec and privacy track record—and all the while company’s interests are aligned with ones of the advertisers, the actual paying users. Stock performance, of course, reflects that.