I don't think that's what is being said. False flag, I presume in this scenario is to say were going to do something about the impending "AI threat" and to be associated with it. There is probably little threat, but to some investors this starts to look like perceived "AGI". Getting your name involved in the hype is marketing 101
I think the commenter is saying that OpenAI committed a false flag operation, not Tailscale.
For Tailscale, this may very well be marketing, but it would be strangely self defeating for OpenAI to do something like what is being suggested. Showing that you failed to govern your model is a pretty poor way to say "We're the only ones who should be trusted to govern frontier models".