A fight can be against spammers.Logical formLearned from13 sentences. A spammer can be prolific.Logical formLearned from12 sentences. A list may pertain-to a spammer.Logical formLearned from12 sentences. A blacklist can be constituted-of-or-filled-with spammers.Logical formLearned from12 sentences. Spammers can be clever.Logical formLearned from12 sentences. Spammers may know that something-is-the-case.Logical formLearned from12 sentences. Spammers may operate.Logical formLearned from12 sentences. Spammers may send e-mail.Logical formLearned from12 sentences. A technique may be used by spammers.Logical formLearned from12 sentences. Spammers can be unscrupulous.Logical formLearned from11 sentences. (Email spammers) can be with addresses.Logical formLearned from11 sentences. (Email spammers) may break a law.Logical formLearned from11 sentences. Comments can be from spammers.Logical formLearned from11 sentences. Spammers may work.Logical formLearned from11 sentences. Spammers may please.Logical formLearned from11 sentences.