"It's a poster child for what's wrong with the rent-regulation system in New York City, " Ms. Kellermann said.

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Arthur Kellermann and Frederick Rivara wrote in opposition in the Journal of the American Medical Association last month.

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Kellermann said that a "giant arms bazaar" has developed in Eastern Europe by which criminals sell cybertools to others.

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"The idea is that you can bundle a lot of complexity and some subtlety into a tool like this, " Kellermann says.

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Dr. Arthur Kellermann, an emergency physician at Emory University Hospital, says there's no "Easy" button to cut through the shifting advice.

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Ms. Lombardi's case represents the flaws in the system, said Carol Kellermann, president of the Citizens Budget Commission, a business-backed fiscal watchdog.

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To make it simpler, Kellermann joined several other researchers and experts from Microsoft to design an interactive tool that's now posted on the federal government's main H1N1 information Web site, flu.gov.

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"That's what I'm most worried about, " Kellermann said.

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Tom Kellermann, a former computer security official at the World Bank who now works at a firm called Core Security Technologies, said the most advanced hackers in the world are increasingly targeting financial institutions, particularly those involved in trading.

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Kellermann and University of Washington pathologist Donald Reay examined gunshot deaths in King County, Washington from 1978 to 1983, concluding that of 398 people killed in a home where a gun was kept, only two were shot when trying to get in.

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