I think it's not illegal to have multiple accounts with the same ip address in bitcoin. you can not just join a signature campaign with multiple accounts, because you can be banned.
Almost every experienced member around here has multiple accounts. One for each agenda. It's an open secret. Just don't spread such news about yourself. You may be sent red trust. And even newbie accounts with red trust are pretty useless. Except perhaps for safely speaking the truth about the green trusted Legendaries' true nature.