What does it usefully mean (i.e. aside from historically-formed taxonomy) for a subject itself to "be political"?
I guess that, as used in this thread, a subject "is" political means that a good way to solve problems within the subject is to acquire greater power via political methods (public demonstrations, party building, lobbying, etc), while a subject "should not be" political expresses a preference (perhaps based on altruistic considerations) that fewer people think that about the subject.
ETA: It seems that historically "personal is political" has more to do with the causes of the problems than the solutions, but with that interpretation it's harder to make sense of "should not be political".
In feminist terms, the ‘personal is political’ refers to the theory that personal problems are political problems, which basically means that many of the personal problems women experience in their lives are not their fault, but are the result of systematic oppression. [...]
The theory that women are not to blame for their bad situations is crucial here because women have always been told that they are unhappy or faring badly in life because they are stupid, weak, mad, hysterical, having a period, pregnant, frigid, over-sexed, asking for it etc. The personal is political proposes that women are in bad situations because they experience gendered oppression and massive structural inequalities.
The last thread didn't fare too badly, I think; let's make it a monthly tradition. (Me, I'm more interested in thinking about real-world policies or philosophies, actual and possible, rather than AI design or physics, and I suspect that many fine, non-mind-killed folks reading LW also are - but might be ashamed to admit it!)
Quoth OrphanWilde:
Let's try to stick to those rules - and maybe make some more if sorely needed.
Oh, and I think that the "Personal is Political" stuff like gender relations, etc also belongs here.