Based on reactions like the ones reported here, caution is warranted. Here is the reason:
The true defining characteristic of the average contemporary academic is total, abject terror of saying anything that might jeopardize her career. Lest a single unfavorable moment be seen by a colleague or administrator, junior faculty on the tenure track often have a second “real” Facebook account under a different name and tweet orblog anonymously. Even tenured academics have much to fear: One wrong move could lose them a grant, promotion to full professor, or any modest raise ever again.