Internet Activists Take Action against Pentagon Research Project.

Byline: Jim Puzzanghera

Dec. 19--WASHINGTON -- Internet activists have a message for John Poindexter, the head of a controversial Pentagon research project to find terrorists by searching the everyday transactions of Americans: Threaten to invade our privacy, we'll invade yours.

They've plastered Poindexter's e-mail address and home phone number on dozens of Web sites, forcing him to block all incoming calls. They've posted satellite images of his suburban Washington house and maps showing how to get there. And they've created online forms to collect even more personal data on him.

"If you are a store clerk, study the photos above. Learn this face. If you are a shipping clerk, study this name," reads a site titled "The John …