I think the rules as they are currently written in the code would adequately cover those situations. The rules do not focus on the medium; the rules focus on the behaviour.
Section 8, for instance, says that a member shall not act in any way to further his or her private interests or those of a family member, or to improperly further the private interest of a private corporation. It doesn't matter whether you do so with a megaphone on the Hill, in a letter to someone, in a telegram or through Facebook. It's all the same. The medium does not matter.
The degree of influence, of course, could vary depending on how many people you actually reach with the medium, but the contravention itself would arise irrespective of the medium. That's why we haven't addressed it. We think the code is nimble. The code adapts to technological evolution—at least that's been my experience in the last four years.