If you think the spammer is actually a spambot, you should report it right away.
From the en.wikipedia.org
I don't mind that folks delete their posts, but it makes you look like a spammer.
From the ocregister.com
If you can read them, you're probably not a piece of software run by a spammer.
From the time.com
The spammer consumes a zombie owner's bandwidth and resources without any cost.
From the en.wikipedia.org
The tactic aims to discredit the victim by making him or her seem to be a spammer.
From the latimes.com
The Defender of the Wiki BarnstarFor properly reverting and warning a spammer.
From the en.wikipedia.org
The Frenchman was kind enough to forward the correspondence with the spammer.
From the guardian.co.uk
And one more thing don't consider me a spammer if you think is fake just pass away.
From the forbes.com
Or is it just one that the spammer his infected with a virus to spam others?
From the economist.com
More examples
Someone who sends unwanted email (often in bulk)
Spam is the use of electronic messaging systems (including most broadcast media, digital delivery systems) to send unsolicited bulk messages indiscriminately. ...
(Spammers) This is a list of individuals and organizations noteworthy for engaging in bulk electronic spamming, either on their own behalf or on behalf of others. It is not a list of all spammers, only those whose actions have attracted substantial independent attention.
("SPAMMERS) Friday Jan 25, 2008 3:34 AM(GMT)
Spammers should be ignored and reported to a moderator or admin. Replying to a spammer's post only complicates things when that post is deleted.
(Spamming) Unsolicited email containing advertising or promotional messages sent to large numbers of people.
(Spamming) Using any search engine ranking technique which causes a degradation in the quality of the results produced by the search engines. ...
(Spamming) From time to time visitors or contributors may post their e-mail addresses in the public posting areas. You agree not to gather these e-mail addresses for purposes of spamming or any non-personal or commercial purposes.
(Spamming) Doing the same attack/spell over and over again, or sending unsolicited in-game mail