Can professors be true radicals?

From Stealing Your Education at Columbia: a User's Guide to Getting a Free Education in New York City:

Some people will say, however, that universities are actually packed with radical professors spouting revolutionary new ideas. Granted, there are some smart professors with interesting things to say, and it’s worth your time to get whatever useful information you can out of them (which is why this pamphlet exists.) But don’t be fooled by these so-called "radical" academics. If they’re so radical, why do they spend all of their time writing books and sitting in their offices? Writing and reading and sitting around should support radical activity, not substitute for it. "Radical" professors, like all professors, are just intellectual bureaucrats without the courage to pursue a radical course of action, no matter what their ideas may be. Like all professionals, they’ve sacrificed their humanness for the supposed perks (more like curses) of a middle-class life. Approach them with caution.

Emphasis added because--Ouch!

What do you think? Is it possible for a professor or librarian to be a "real" radical/political activist? Unfortunately comments are not allowed anywhere on the Barnard website, so respond by tweeting, including @barnlib in your message, adding to the thread on the Barnard Zine Library Facebook page, or emailing zines@barnard.edu

Full text of the zine

Also, what do you think of the subject headings I assigned?: 
Columbia University--Handbooks, manuals, etc.
Education--Political aspects. 

Can you think of others I should have added or used instead? I have to admit, I amused myself with the first one.