feeding a troll 

When you fail to see someone is trolling and you are like : I am gonna come back at this guy with some logical argument and he's gonna see the errors of his ways and walk away from the situation.

How could you have been so stupid?

Throwing logic at a troll is like throwing a piece of sausage at a tank. Wasted effort. And plus, you lost a sausage. You could have made a moderately yummy sandwich with that sausage and now you have nothing for lunch. Yup. That's what you get from feeding a troll.

feeding a troll by Dunder Ball January 12, 2015