Security researcher arrested after he warns Hungarian transit company about their dumb mistake

A teenager discovered that the website of Budapesti Kizlekedi(C)si Kizpont -- the public transit authority in Budapest -- would allow you to edit the price you paid for your tickets, so that purchasers could give themselves massive discounts on their travel, and when he told the authority about it, they had him arrested and issued a press-release boasting about it. (more")