Hate to be anal (who am I kidding... I love it ) but I think that Gopher is mixing up two scriptures.
1 Cor 5:11: But now I am writing you to quit mixing in company with anyone called a brother that is a fornicator or a greedy person or an idolater or a reviler or a drunkard or an extortioner, not even eating with such a man.
2 Jo 10,11: But now I am writing you to quit mixing in company with anyone called a brother that is a fornicator or a greedy person or an idolater or a reviler or a drunkard or an extortioner, not even eating with such a man.
Of course, the WT's application of both scriptures essentially ignores the ones that Blondie pointed out.