Someone is claiming they hacked me!

It's unlikely that you have been hacked. If someone is harassing you in Ustream chats please type !911 and Ustream Administrator will join the chat room to assist.

Don't worry, it is incredibly unlikely that you have been hacked. That is, however, so long as you have a strong password for both your Ustream account and the email you used to sign up with Ustream. To play it safe reset your passwords using a random combination of letters and numbers and always use a unique password for each service.