There are 3 main reasons you can be banned from the Omegle chat service.
It also offers a convenient browser extension for the Chrome and Firefox platforms.
However, users can indicate their personal interests, and the service will then look for other users who are into the same things.
When you choose to hide your contacts, then the contacts in your address book will never be suggested to you.
A user can also choose to add their interests, and Omegle will try to pair a user with someone who has similar interests.