Depending on the content you post though, it could hypothetically be traced to you. Potentially even mundane things like mentions of geographic locations, word choices, common phrases you use, common topics -- all of those could be considered at least partly identifying in the right contexts (assuming someone was looking for it and already had info about some particular cue that indicates you).

The point is: you can't really be too careful, and realistically should assume there is always a way someone (including yourself) could be jeopardizing your privacy, if not overtly (by some kind of software or network tracking) then by holes in operational security.