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They have an extensive user karma/reputation system to try to control spam.

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Quoted:What is Go Ask Alice! Go Ask Alice! is the health question and answer Internet service produced by Alice!, Columbia University's Health Promotion Program — a division of Health Services at Columbia.

This site has three primary features:

* New GAA! Q&As of the Week gives you the most recently published inquiries and responses — this section is updated every Friday.

* Search GAA! lets you find health information by subject via a search of the ever-growing Go Ask Alice! archives containing nearly 3,000 previously-posted questions and answers.

* Ask Alice! gives you the chance to ask and submit a question to Alice!
A health question-and-answer site run by Columbia University's Health Promotion Program, Go Ask Alice! is a great place to ask embarrassing medical questions anonymously. Check out the especially insightful hangover tips!