A couple co workers, and some other shooting buddies. We have the permits, pay the fees, and comply with all the federal NFA regulations. They're not all that uncommon. Everyone is always curious and then delighted when I offer to let them shoot. Every young shooter (10-16 years old) and new shooter comments on how much easier and more comfortable they are to shoot - basically it makes the guns less intimidating to new shooters. People are always asking nervously, are they legal? I explain yes, show them the paperwork, and then explain how they too can get them. I'll bet I've gotten about 4-10 people to buy suppressors!
I only got one negative reaction at a gun range when using my silencers... some old fart with a few antique revolvers in the stall next to me kept looking over at me with disdain. Seemed odd since, technically, I was shooting more peacefully than him. So I decided to really troll the guy and pulled a submachinegun out of my range mag and blew through a few magazines. He left - LOL.
I once OPEN CARRIED my Glock 19 with a silencer on it. It was only one of two times I ever open carried in public. You get some real weird looks when people realize what's on your hip - lol. Sitting down is kind of a chore because there's a 10" tube hanging off the barrel.
Trolling people in real life 
Edited to add (my favorite suppressed gun):
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