I think very few active jws here will admit to shunning, since they are likely to chastised on this board for still doing this, when so many here are on the other side of the 'dub snub' ( hee -hee, I like that term BFD )
What I've noticed has been quite the opposite, however. DF'd persons who still attend meetings tend to show a lot of respect and will tell someone who unknowingly speaks to them, that they're DF'd. I have had that happen to me several times where I've missed the announcement or visiting another KH, and spoke to someone and they've let me know that they are DF'd. Maybe they are trying to get reinstated, I don't know, but I don't think I've ever seen a DF'd person trying to actively socialize at the hall.
I don't run into many jws outside of meetings, although I work with several, one of whom is DF'd and I speak to him all the time. Just 'hi' and 'bye'. I pretend I don't know about him being DF, but in actuality I just don't care. I would probably speak to anyone that I ran into, although I doubt I'd be hi-fiving them at the meetings. I'm much more likely to make eye contact and definitely smile. ( as a matter of fact I do this on purpose, because I know it's hard on them, especially the younger ones)