I've enabled anonymous comments for this one (and no IP logging). I'd probably prefer anonymous comments on this one, unless we know each other REALLY well (the very short list this applies to knows who they are, I'm sure).
Why am I doing this? I have no idea. It seems like a good idea, and I could probably come up with some good justifications, but the best reason is that it feels like something I want to do, which probably means it is. (Hey, look, there's a freebie for you. I tend to spend too little time thinking about things.)