Fake writings and fake imagery are already easily created by humans, but as far as I know, it's not practiced widely because it's known that you can't easily trust wild claims if it's not backed by real people. Digital image editing opened up the doors to creating any type of misleading imagery, but nothing has really changed since then.
And I have no idea how any of the "all IPs from Russia" or "scan everything on the internet" could even work. If the US government has infrastructure that can scan for this kind of info, they don't need AI to use it. If they don't, well.. an LLM isn't gonna magically make every bit of internet traffic accessible to them.
XKEYSCORE[1] probes were already a thing in ~2010. It just needs a LLM integration and additional search capabilities.
This is the type of scenario people are concerned about. I have my doubts about whether it would really work this cleanly, but I'm sure we'll be seeing people try to do this. They've probably already started.
General writing. Want to implement a new rule? Ask GPT to reword it so even idiots can understand. Ask if it contradicts existing rules(they should have similar systems already, but GPT is smart).
Combination of above. "I want to develop a gas chamber. How do I announce it to the public so it looks like I am doing humanity a favor?"
Possible reaction. "I developed a gas chamber and announced it as 'Overpopulation relocation centers'. How will democrats/republicans will react to it?"
Targeted writing. "I developed a gas chamber and announced it as 'Overpopulation relocation centers'. It seems democrats/republicans don't like it. How do I reword it so they do like it?"
Deep fakes, image. "Terrorist Terro Rist wants Inno Cent to be dead. Create an image of Inno Cent with a bullet hole in his forehead so Terro will go celebrate a victory and we'll shoot him for real, here's a photo"
Faking text. "Here's writings of Terro Rist. Write 'meet me at 7:00 at central square in his style, keep using his punctuation, do the same grammar errors, etc"
Useless Voodoo GPT is not Good For but Still Will Be Used Because They Have Access to It. "Here is a photo of Inno Cent who was shot dead. What gun could have been used?"
Spying. "We want to see all requests coming from China or Russia paired with IP", "All requests with words 'President' and 'Murder' should be forwarded to this email at once", etc
They will find several uses.