"Waiter! Waiter! There's a fly in my soup!"
"Quiet, please sir, or everyone will want one."
I haven't had trolls, but then I'm not on Facebook or Twitter, which probably helps. (My marketing efforts are almost non-existent, putting me in mind of a Simpson's episode with Ned Flander's father: "You've got to help me, I've tried nothing and I'm all out of ideas.")
On the other hand, my new found presence on the web has led to people from my past being able to find me. Most recently someone I hadn't spoken to in almost 40 years! (Sadly, none of these contacted me to get signed copies of my books. I must be doing something wrong.
)