If one of your accounts gets banned, they will all get banned if discovered. On Bitcointalk, they don't ban the account, they ban the person behind the account making the posts. So if you get banned and you come back to start over, that new account of yours will also get banned once a connection has been proven. It's called ban evasion and is against the rules. If you get banned, all you an do is create an alt account to appeal the ban.
maybe they will be sad if it happens..the contribution is high but the correction is too late..i personally prefer 1 account but it can be useful for many people..a lot of work is not done, even a topic of discussion is not finished..I learned a lot about masters here ..
Surely you have encountered newbie with 1 post who make off-topic reply which include random link. That kind of user who share shady website/perform SEO spam is banned on daily basis and i report them almost everyday.
I've seen posts like that.. of course they don't want to be like that.. because maybe they want to post quickly but don't understand a good and correct discussion.. will be tested with time. newbies can develop and mature with forums not just rankings that are pursued but the art of discussion and useful knowledge .. it will be very difficult to accept the fact when the post is deleted for beginners .. between continuing or stopping a criticism to build ..nice to learn with you