Many online journals are ready to publish bad research in exchange for a credit card number. That's the conclusion of an elaborate sting carried out by Science, a leading mainline journal. The result should trouble doctors, patients, policymakers and anyone who has a stake in the integrity of science (and who doesn't?). The business model of these "predatory publishers" is a scientific version of those phishes from Nigerians who want help transferring a few million dollars into your bank account. To find out just how common predatory publishing is, Science contributor John Bohannon sent a deliberately faked research article 305 times to online journals. More than half the journals that supposedly reviewed the fake paper accepted it.