dear MrTheocratic...
Paul is making a distinction between those in the congregation (where you would share a fellowship meal including the elements with the "brother") and those who are outside. He says in verse 10 that he didn't mean stop associating with these people outside the fellowship. If the "brother" is removed from the fellowship ie: disfellowshipped...he becomes part of the world, no longer a "brother". In which case he can be associated with as paul says because he no longer "contaminates" the purity of the "bride" or congregation which was the point in disfellowshipping. The JW's have no scriptural grounds for SHUNNING outside the doors of the kingdom halls. Jesus didn't shun and paul didn't encourage it either. Paul says it another way and for a different reason...if someone comes to your house (for fellowship as was the case in the early church) and he doesn't have the doctrine of Christ, don't allow him in or your have a part in his evil ways. Again, this is about the purity of the fellowship not about associations outside the congregational fellowship "meetings"
love michelle