Is it normal to enjoy recieving unintentional negative attention?

I know that some people are easy to p*ss off and offend, even if you didn't mean too. Is it normal to be thrilled that a person is mad at you over something silly? Like you preferences or hairstyle? I have a friend who just found out that she offended her roommate because she said that she "likes to be lean and thin". I think it's silly that her roommate would be upset over this, but I think my friend should just ignore the anger. Instead, my friend is going out of her way to annoy her roommate even further. She is going to the gym everyday and dropping subtle hints she wants to lose more weight. Her roommate hates diets and societies obsession with clothing size, so my friend knows her behavior bothers her. I will admit that I some people are easy to p*ss off and offend, and I have taken advantage of this when I was in highschool, because it was funny to see someone so fixated on you over something silly. My friend does it chronically, if she finds out that someone is mad at her over something stupid, then she is thrilled. One time she found out that someone disliked her for bleaching her hair blonde, she then began to make it a point to mention her next salon visit everytime the said person was in the room. I just try to ignore people who are over-sensitive and insecure, but my friend loves and revels in the negative attention she recieves over stupid things.