<div><p>LONDON (Reuters) - Cult graffiti artist Banksy has been given a dose of his own anarchic medicine -- one of his best-known works has been defaced with a paintball gun.</p><p>The picture, on the side of a sexual health clinic in his home town of Bristol, shows a naked man hanging from a window ledge as a jealous lover scours the horizon and an adulterous partner looks nervously on.</p><p>"There are about five or six blue (paint) splodges on the piece," said a spokeswoman for Bristol City Council.</p><p>"I think he (Banksy) has challenged a councilor to clean it, because the council once said it could clean off the original graffiti for a fee of 10 pounds," she said.</p><p>In 2006, the council asked the public to vote on whether the mural should stay or be removed, with 93 percent of respondents saying it should stay.</p><p>Works by the anonymous English artist can fetch hundreds of thousands of pounds and are popular with some of the world's biggest stars.</p><p>An exhibition of his work opened in Bristol 10 days ago. It runs for 12 weeks.</p><p>(Reporting by Stefano Ambrogi; Editing by Steve Addison)</p><img src="http://admatch-syndication.mochila.com/images/ad.gif?aid=53319927&bid=informcom" /></div><div id="copyright"><div>

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