Mike:
On the one hand I think an off-topic forum would be great for the "Thread Hijackers" that like to start the smack-talkin' - junk'o'thons that some serious posts sometimes wind up being. For them, an off-topic area would be a good location to 'vent' and generally be smack-talk silly. However, I would be afraid it would get out of hand too quickly, and .... as the saying goes ....... it could get ugly. For me, it might be "light" entertainment, and I'd go there occasionally just to read the
smutchsma. But, beyond that........
On the other hand, I'm not sure how much popularity a "Non-Porsche, Non-PCA, or Non-PCASDR" forum would be on a PCA website if you wanted that forum to be available on the PCASDR website (Seems a little bit of a conceptual and theoretical conflict?

). Seems like there are other places to go to talk "non-Porsche" stuff, like the BMW website

(just kidding). Seriously, I'm not sure how popular it would be, and I'm sure it's a lot of work to set up a forum. Good question.......
Just my 2-cents.
Dan'o