You can look up error 80711008 here: You must login or register to view this content. also you need to provide more information like first off are you on CFW ( chances are that you are), When are you getting the error? Are you getting it while trying to sign in or trying to sync trophies etc. Also Here a tip for the future next time you should post in the help section here You must login or register to view this content. if you need help with your PS3 system.
One solution you can try is Kas that he/she posted here You must login or register to view this content.
Originally posted by Kas
If you get 80711008 just simply sign out and back in and if you get it again simply repeat.
Originally posted by abby
Banned make a new account or buy a new cid sorry
Chances are that the error he is getting does not mean he is banned. A quick Google search can show others have had that problem from networking errors or from trying to sync trophies so lets not assume yet that he got the ban hammer via account or CID.