Oh no, I gave it a couple of my throwaway accounts, and there was a good amount of overlap in the results. Either it gives everyone similar answers, or my throwaways can be easily linked to each other.
Yea, create some disinformation - but more likely than not, if the AI is any good, the author should be able to differentiate fakes from real connections.
Unless you take extreme precautions, throwaway accounts would be relatively easy to link, by those who run this site. Whether they care, or take the time to do so, is another question. Either way, it can't guarantee anonymity from the most sophisticated actors, it's just a way to keep differing opinions from turning into sustained grudges and personal feuds.
I'm fine with admins being able to link accounts; I'm sure that's very useful for spam prevention. But ideally, I don't want members of the public to be able to link accounts. Maybe you're right; maybe it is hopeless against the most sophisticated actors.