So like if I think not using master/slave is not only important morally, but also important for recruiting, is suggesting we remove it for business reasons a political discussion? Hmm.
I don't believe it's not allowed to be discussion though, just not permitted on the official company basecamp account. Perhaps the implication is that listening to your politics should be optional for other people working at basecamp.
Those legitimate arguments are themselves not in in the context of IT, though. They lie in the intersection of word semantics, etymology and the racial politics of the extreme left.