Is it really necessary to rip on other celebrities?

Like I understand we're fãs of Prince and Michael Jackson. But does that mean we should be mean to other celebrities. It's not nice, and Michael hated it when other people were made fun of. We can get our points across without ripping on someone else thats famous. They havn't done anything to us, and we shouldn't be soo mean. I mean we have made fun of: Eminem, Madonna, Justin Bieber, Lourdes, Miley Cyrus, Jonas Brothers and soo many more.