That went out of window and provably failed even before LLM. The strategy of flooding everything with cheap false claims and arguments while demanding that the opponent spends increasing amount of effort and time was a success even before. It became worst with LLM.
So, no, you are making the claim, first prove it is worth any of that effort.
Ad-hominem (literally: "to the person") requires a person on the other side of the argument. This wasn't made or written by a person, thus ad-hominem does not apply.
Thats a bit pedantic. Youre still arguing against an entity rather than addressing the argument.
If you prompted an LLM to make a PSA that people should brush their teeth, is it a fair to argue that brushing your teeth is bad because an LLM made the argument?
When you disagree with an argument, you are supposed to address the argument itself, not the thing making the argument.