Blogging, tenure and the incentives of tenure committees

My last post made me think: Do non-blogging tenure committees punish blogging because it threatens to make their lives more difficult?   

I wonder about this because Drezner had his tenure denied despite what would seem to be a pretty impressive resume (though of course I don't know the applicable standard). Bloggers are broadly engaged with everything that’s going on, not just a narrow specialty. And blogging involves presenting work for public scrutiny and possible criticism.  If blogging emerges as a new standard for academic success, this could invade the quiet life of the ivory tower. 

Comments?