Facebook's current problems should be a learning case for unintended consequences. Zuckerberg just saw the benefits of technology but had a blind eye towards the problem. He's only now admitted that there are problems but these problems have been building. His motto of move fast and break things does not scale and eventually really important things break and can't be fixed.

We need to keep this in mind for the coming technologies which have a greater impact on society. Yes, tech is important but not at the cost of Society's well being.