https://www.bleepingcomputer.com/news/security/364-idaho-inmates-hacked-their-prison-tablets-for-free-credits/

Idaho prison officials announced yesterday in a press release that they've identified 364 inmates who have exploited a vulnerability in their prison-issued tablets and have used it to assign nearly $225,000 worth of digital credits to their tablet accounts.

Inmates used these digital credits to buy access to music and games that they could play on the tablets.