as the main concern it the topic itself, which is if the two accounts are connected, because if yes, then you're abusing the two signature campaigns.
Proof?
I don't even found they both apply in the same campaign or they ever participated in the same campaign. They both participating in signature campaigns, but two different campaigns, so technically they don't abuse it.
The thing they abuse is participating the merit event by fillippone, but unfortunately I don't found the rule of forbidding alt accounts.