On one side: powerhouse New York investment bank Goldman Sachs.

On the other: maverick Florida blogger Mike Morgan, who runs a Web site called GoldmanSachs666.com.

There isn't much likelihood you'd get the two confused, as GoldmanSachs666, the blog, is devoted to the notion that Goldman Sachs, the bank, secretly created the current financial crisis through neglect or design.

Yet a cease-and-desist letter sent to Morgan last week from a law firm retained by Goldman Sachs wants his blog taken down for the following reasons:

"Your use of the mark GOLDMAN SACHS violates several of Goldman Sachs' intellectual property rights, constitutes an act of trademark infringement, unfair competition and implies a relationship and misrepresents commercial activity and/or an affiliation between you and Goldman Sachs which does not exist and additionally creates confusion in the marketplace."

Morgan's posted the letter on his site, the front page of which reads right at the very top: "This website has NOT been approved by Goldman Sachs, nor does this website have any affiliation with Goldman Sachs."

Further down the page, Morgan gives this disclosure: "Yes, I am short Goldman Sachs stock. I believe this company is evil and should not exist. We need to begin to break up companies that have as much control over world finances as Goldman Sachs."

As tech-news Web site Ars Technica noted, so-called "gripe sites" are generally protected under the First Amendment. Yet the example it cites, Lowes-Sucks.com, isn't around any more.

"I've had advice from some of the best intellectual property lawyers, and I know exactly what I can and can't do," Morgan defiantly told Britain's Daily Telegraph. "We're not going to back down from this."

• Click here for the Daily Telegraph report.

• Click here for Ars Technica's interpretation.

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