Hi
it means designer has been banned, there can be many reasons. mostly it because they want to cheat the system. aka they use logos they havent created or they have stolen other designers ideas. We have violation points sytem where different bad things gives you different amount of violation points. some are bigger sme are smaller. If your points reach to certain ammount your account will be banned. People who resells their logos (they use their winning logos in other contests) will be banned very shortly. Its all about giving Logotournament clients a best service. We dont like cheaters here. Not sure what was the case about person who you mentioned, but hope you get the idea what might have been happened.
Thanks