At the risk of offending people, at the time, the best departments to learn bullshitting were the deparments that weren't actually philosophy, but were grounded in 20th century continental philosophy (a.k.a. "critical theory") such as English and anthropology.
Don't get me wrong, there's plenty of crap in every academic field, but at least in most fields, sensible practitioners left themselves the traditional tools for identifying the crap and forming a consensus about what was valuable.
Intro to Philosophy
General Psychology
And I mean that both from a knowledge-for-knowledge sake point of view, and a pragmatic view.
In contrast, it was the courses I took related to my major which were utter bullshit.
Your formulation concedes, of course, that being able to bullshit is, indeed, a useful skill. I would go farther to say that the ability to bullshit well should not be mis-underestimated.