I'm not defending Rockstar here but it sounds to me that they shouldn't have to spend resources just because some random people decided to create cheats.
I much rather have them developing more content/games.
Obviously Rockstar had to devote some resources to this question, otherwise developing cheats would be so easy no one would bother to buy them. Rockstar think they've spent enough, so now it's on the Australian courts to spend Australian public resources on this vitally important Australian public interest. One doubts that a developer of e.g. educational software could expect such generous treatment.
I take it your webservers have no csrf protection, run on unencrypted http, pass passwords in plaintext over basic auth, run with root-level permissions on hardware, and haven't been updated ever.
They don't have to do anything technically - they are free to leave the game Goat Simulator buggy or turn the next one into a kitten petting simulator. But there are consequences for that. As long as they care about quality or at least success providing support and properly setting access permissions and securing their architecture to not do things like trust the client is important.