Seems to be that you most likely will get banned if you link accounts under battlenet. If you do internet searches you will find that notoriously "account-selling" websites tell you not to merge the accounts.

I have therefore purchased an extra couple accounts and levelling 2shamans, 1 druid, 1 hunter moos with RAF. I will keep the other accounts for Roleplaying needs. We have a very complex story going on and it is actually one of the uses I have for multiple accounts usage .

Regards