Can you design things to be shared? Of course you can. While "sharing" is ultimately up to the end participant, it's up to the "designer" of the "thing" (this could be content, a platform, a product) to build the option and ability for sharing to occur. The media industry had no choice but to innovate in this space as my colleague Steve Rubel likes to refer to as "the war for page views". As, I've written recently—there are still untapped opportunities to enable and even kick-start social sharing behaviors.