From the Volokh Conspiracy:

It turns out, according to the study, that 17.6 of professors in the social scientists consider themselves Marxists. Only academics doing a survey of other academics could possibly think that this is low (actually, the authors use the term "rare"!). The next time someone tells you that conservatives avoid academic positions in the social sciences because they believe in nonsensical superstitions with no empirical or logical support, while liberals believe in the scientific method, remember that 17.6% figure. (Update: See also Freud and Freudianism, whose time thankfully seems to have largely passed.)

UPDATE: Among actual scientists, in the physical and biological sciences, the percentage who identify themselves as Marxists is zero.

What's really remarkable about this survey is that while socialism is at least a somewhat practical implementation of Marxist ideals, to be a Marxist you really have to be out in La La Land (Marxism has no government, everybody just takes what they need and sings Kumbaya...)

Of course, people who actually embrace socialism deserve what they get--when a government owns everything and the people own nothing, that's pretty much the definition of fascism. I believe the more common acceptance of socialism is that its a good idea for "you" as long as I'm part of the power-elite.