Some people are still unclear about what it means or what happens once they’ve published their program under an open-source license. In the most recent example, mikeeusa, the author of an obscure game called GPC-Slots 2, claimed he was rescinding the program’s GPLv2 license from some people and “from anyone who adds a ‘Code of Conduct’ anywhere near my code (to ‘fight sexism’.).”
While this specific case doesn’t really matter — the text-based casino game hasn’t been updated in over a decade and appears to have no players — the issue of whether one can block users from using code once it’s been placed under the GPLv2 bothered enough people that it’s been one of the hottest stories on the Linux Kernel Mailing List (LKML) for over a week.