It's kind of humorous, but I have more or less "shunned" someone because of their inexcusable behavior. Oddly enough he was an ex-JW.
Corporate moved him to our office, and when I found out he was an ex-JW I was ecstatic, hoping to have an ear to bend when the mood struck me. He even moved into my apartment complex.
Then I found out that he was a thief, a gross liar, a braggart, and a two-faced narcissistic a-hole. He threw everyone, including me, under the bus more than once, undermined our relationships with clients, and supported a drug-addicted girlfriend by stealing from petty cash. I wanted nothing to do with him, a sentiment shared by almost everyone else in the office.
We ganged up on him, presented our complaints to Corporate, and they shipped him back to HQ.