If you have a dedicated customer forum, those who show up out of the blue will get the impression that help is officially offered and a sense of entitlement is appropriate. I think it's obvious how that pans out.
I think you're better off not having one. The way it is, you can offer help to those who you think deserve it, and tell those who don't to bugger off, because it's a UPS watering hole, not a UPS customer service center. My 2c.