bhrigu: I am really surprised and disturbed that the staff didn't feel the need to publicly comment on the issue. Not even some PR stuff.
probably would have helped if OP contacted GOG support first, instead of posting a tutorial on how to abuse this and hoping a Blue will accidentally see his post.
They fixed similar issues in the past, they fixed the "91" issue pretty much within a day, so the argument that "GOG never does anything anyway" is just nonsense.
of course this way of doing it ensures a much bigger drama. And in the end we are all here for the entertainment, aren't we ...