I'm not an active JW, so maybe I don't qualify to answer...but I'm gonna throw in my 2 cents worth anyway...
I no longer accept the shunning policy as set out by the Watchtower Society, meaning that I no long shun people just because someone at a Kingdom Hall announced them as no longer a JW. That is forced shunning. People in the JW faith shun others just because they're told to, not because of a legitimate reason. I've reconnected with some DFd friends from years past after realizing the abusdity of such a practice. I'll decide for myself who I want to associate with, thank you very much.
Technically speaking, however, all people practice a form of shunning, one way or another. We may know someone who has hurt us and we avoid them. We may know someone who is in trouble with the law or uses drugs and we know that if we hang aournd them too much, we're gonna get caught up in their shit, so we avoid them. These are conscience decisions that we make on our own, knowing the facts and the persons involved.