[alexk]

Agreed, I'd rather spend time building some cool features for developers everyone can use instead of confronting scammers trying to steal someone's else credit cards, so it's definitely the fight we chose.

Talking about traditional ip, domain and complaints reputation - it helps a lot to identify and block ignorant senders using some questionable techniques for getting their recipient lists, but it's pretty useless for fighting phishers - you need to act immediately and automatically, and reputation takes time to aggregate.