How social media changes the landscape regarding “drug messages”

How is social media (YouTube, Twitter, Facebook, etc.) changing the landscape regarding “drug messages”?
What new forms of or enhancements to social media can you envision over the next 5 years? How will be media’s role and hence its impact change in the future?
How can the Pharmacists’ voices be heard in this new media environment?
Given the rapidly moving marijuana legalization landscape, what biases now seem to be present in Nixon’s “War on Drugs”?