I recall when my partner Brad and I were raising our first USV fund, back in 2003, and potential investors wondered about my blogging habit. They asked if I was making a mistake telegraphing our investment thesis for everyone to see, including our “competitors.” We strongly defended the practice and explained that the benefits of telling the world what we were looking to invest in, and why, strongly outweighed any costs. We explained that telegraphing would bring entrepreneurs to us. And that...