1. They are new. (New is cool).
2. They don't know anything, so feeding them a load of BS is an easy job.
3. They'll shut up when you tell them to.
4. They'll revive dead chats with their annoying and silly questions.
5. They don't know how to work certain features, so watching them fail will be funny.
6. They make you look good.
7. They'll make bad edits, forcing you to revert them which in turn raises your badge ranking. And if you continue, the admins will take notice of your edits and ask you to join them.
8. You can ban them for asking too many questions and raging when they don't get an answer. (excitement)
9. They never talk cause they are shy.
10. They make the interwebs go round.