(No malicious intent meant to any OOF member, named, implied or otherwise - but exercising might right as a member to present my feelings on this)
Speaking as a long(est) standing member here, I think Kevin Wood has hit the nail on the head.
At the risk of going slightly OT, I don't think its politics
per se, but the attitudes and entrenched views of many of the members posting on those threads. We could repeat the same for other passionate threads such as oil, tyre, brake topics - although it would be daft to ban these on a car related forum

. That said, we used to half heartedly ban oil threads at the start.
The trouble is, at the moment, the state of gendis IMHO is bloody depressing. Every thread I read is depressing. At the end of it, I feel depressed.
OK, I could choose not to read them - actually I do choose not to most of the time, because invariably its not open debate, but people forcefully presenting their own agendas (but don't tell my fellow Moderators, as this clearly puts extra load on them

). I wonder how many other members choose not to get involved in gendis for the same reason? I think the answer to that question lies in the fact that its the same old posts, with the same old members posting the same old crap.
However, I think the poison in this is that the moaning/bitching becomes quite contagious. And this is the absolute key. How many new members want to actually join in, when all they see is a clique (to use a term often banded about by those responsible for a lot of the negativity) of people with dubious, entrenched personal viewpoints on subjects, and are scathing to anyone who disagrees. I'm a long standing member, and I don't want to join in. God only knows what the newbies think. The fact that virtually no new genuine newbie has posted speaks volumes.
Look back at the earliest threads. There was an air of positivity across the entire forum. The site was welcoming to all. People arranged fixing sessions at their homes, with loads of members turning up, all in order to genuinely help. Yes, sure, as DLK will say, some members took the piss, which is something I know really goaded him, but lots was achieved, and nothing was impossible. The national meets (Lakes and Newent) were packed (as were York and EA), the day meets busy.
Fast forward to now. There is an air of distrust, negativity, and general depression. Yes, we live in difficult times, and I'm guessing none of us are exactly rich, thats why we drive Omegas. But to spill that depression over into our little online world has killed the community aspect of the site.
The forum's heart follows that of its active members. Tosh? Take up my suggestion to read the earliest posts on the site, and then deny that you don't feel uplifted by it - its a method I use every time I hover over the Delete Account button.
So, to directly answer the question set by Hotel21, I'm unsure. I welcome free speech, within the guidelines, but think a lot of the problems that OOF has now stems from the depressing threads about politics (and others).