Guest post by Ian Greenleigh, author of The Social Media Side Door (Fall 2013) and social strategist with Bazaarvoice. Follow him on Twitter @be3d Products were once contained by physical ownership and access. To experience a product, you had to buy it or try it. Brands extended beyond the idea of physical products into other types of consumer exposure to companies. Non-customers have always had access to brands outside of the ownership capacity, through advertising, word of mouth, and any…