If you are cheating on alt, if you get banned for altering your save file (in any way including for unlocking dlcs) and you are using a hwid spoofer... both accounts will be banned as this is not on EAC side but ACM. ACM has the ability to find all your accounts (if not all your ids are changed), this can be avoided by using a spoofer that changes all of them (there was 1 and nowdays is detected, you can find on google).
ACM can and will ban all your accounts (manual ban)
EAC will only ban the account you cheated on if you are on a spoofer, otherwise, it will end up the same (as in ACM case)
To get hwid banned, you must gain 3 bans on the same hwid.
ACM - Associate Community Managers