I'm always amazed that people seem shocked when something they've trusted is usurped for commercial gain. Somehow, in a world that's incredibly dynamic and built on Darwinian evolutions at all levels from single cell organisms up to commercial entities, we still hold onto this naive view that our trust in systems is somehow static.
This is probably because we build our relationship with trust based on our relationships with close friends and family. In most (healthy) cases, this one-to-one trust grows slowly or remains constant over time. A fairly static model for trust is reasonable in this microscopic system.
Unfortunately, we tend to implicitly model the trust we place in third parties and macroscopic communities along similar lines and that simply doesn't reflect reality.