Idk, maybe not allowing up to 5 phone numbers per account to call would cut down "non-human/multiple fake listeners".
I'm afraid that won't help. This would just result in even more fake accounts getting registered. I've blocked many fake accounts manually since we added the USA in September. It's just not worth the time.
Perhaps seakazoo is referring to the 5 phone number limit per account? If there was no limit, then the amount of fake accounts would be kept to a minimum as they would just use the same account.