I had a little insight at the dog park today.
There's a small dog park and a big dog park, referring to the size of the canine visitors, not the area of the respective parks themselves.
My dogs, being small to middlin', use the small dog park.
Now Tucker LOVES to race along the dividing fence, barking furiously and taunting the big guys on the other side. He snarls, snaps and howls, enticing them into long chases back and forth.
But if one of those Great Danes, Labs, or Rottweilers should happen to visit the small dog park? Tucker would make a bee-line for me at full speed and either try to climb into my arms (if I was standing), or jump onto my lap (if I was sitting down).
Internet trolls behave exactly the same way! Hidden behind their supposed anonymity, they taunt, trash-talk, and insult. But if you smack 'em down, or track 'em down, they collapse like a fallen souffle or run crying for mommy.
(No, I don't have a problem with trolls. I'm not popular enough! :))