First, if such a forum already exists, it needs better marketing efforts behind it because I could not find it.
Second, as I am dubious that such a forum already exists, I recommend the creation of a SCRAPING Forum within Black Hat World. I do not know the proper protocol for such recommendations, hence I am tossing this here. If it needs to move, whoever has that power, please move to the appropriate location. Hopefully not the trash bin.
Mod edit: List below.