The act of making a response for no other reason than to gain attention. It is commonly displayed by insecure, or narcissistic people. Even if the remark is rude, or starts an argument, the person trolling gains the social interaction that they wanted. This is displayed more in women than men.
Suzi: MY LIFE SUCKS
Jack: awww what's wrong?
Suzi: blah blah blah drama drama drama
Jack: It's alright! <3
Suzi was not upset, only wanted people to acknowledge her. She is Internet Trolling.
Joe: People can be such assholes!
Paula: Is it me?
Joe: No <3
In this case Paula is internet trolling. She had no reason to think it was her, she just wanted Joe to acknowledge her.