Fred Wilson venture capitalist and Co-Founder Union Square Ventures
“I have always hated the idea of social proof. It's just the herd instinct at work. It's nonsense.
If you can't figure out why you like an investment and why it will be successful, don't make it. 
But we don't care who else wants to invest. In fact, I'd prefer if nobody else wants to invest in it. That would be great.
Make up your own mind. Don't follow the herd. Don't chase.” Fred Wilson, Social Proof Is Dangerous, Jun. 6 2012 http://www.avc.com/a_vc/2012/06/social-proof-is-dangerous.html