There should be a special place in academic hell for:

1. Expat academic scientists who only talk with, advise, and collaborate with people from their own home country. This is wrong on many levels. I know quite a few such specimens, from several different locales.
2. Professors who work at research-intensive, PhD-granting institutions, yet cannot be bothered to train graduate students. They can only work with postdocs because their work is “too complicated” (as opposed to everyone else’s simplistic work). The fact that somebody else had to train all those postdocs, from baby graduate students to the level at which the are professional PhD-holding scientists, doesn’t seem to enter these people’s minds.

Any other candidates for eternal academic damnation?