This Wikipedia article is one of several articles on the Internet that does a good job of describing blog trolls. It seems there are more trolls on poetry blogs lately, just as there are more poetry sites on the Internet that have viruses, including the site famouspoetsandpoems.com.
The general advice, when dealing with trolls, is simply to delete them quickly. Do not respond. And definitely do not click on their links.
Nin Andrews is the author of 5 full collections of poetry and 6 chapbooks. She is also the editor of a book of translations of the Belgian poet, Henri Michaux. Her literary comics are posted on Best American Poetry's Blog on Monday mornings.