People can do what they want in their spare time, true, but that it is their spare time does not make the action responsible or irresponsible, nor does it shelter them from responsibility.
Not wearing a seatbelt when at work or in your spare time is irresponsible.
Writing code, without tests, that others use (and for security at that) is irresponsible.
Not wearing a seatbelt when at work or in your spare time is irresponsible.
Writing code, without tests, that others use (and for security at that) is irresponsible.