This is a BYOD article, right. So the implication is that I am supplying my own smartphone to basically check my corporate email on the go. If I can't use services like Evernote, which gets me through a work and personal day, then I might as well buy 2 phones (1 for work and 1 for personal use) or not participate in the BYOD program.

If you prefer that users not use social networks during work hours then create a User Agreement Policy and try to enforce it through training or even remedial action if necessary.