The forum is not actually against alt accounts however the forum frowns at alt accounts. Basically if you disclose your alt accounts then you are actually transparent and not trying to cheat. On the contrary those that don't publicly disclose their alt accounts are actually looking to cheat in signature campaigns and contests.
So, what if a member have a second account but did not publicly announce on the forum that the account belongs to them and they also do not cheat with the account and don't have intentions to cheat with the account but for their own best reasons, they don't just want to publicly announce it, what would be the consequences if it's is noticed?