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Consider that if stuff someone says resonates with you, that someone is optimizing for that.
There are two quite different scenarios here.
In scenario 1 that someone knows me beforehand and optimizes what he says to influence me.
In scenario 2 that someone doesn't know who will respond, but is optimizing his message to attract specific kinds of people.
The former scenario is a bit worrisome -- it's manipulation. But the latter one looks fairly benign to me -- how else would you attract people with a particular set of features? Of course the message is, in some sense, bait but unless it's poisoned that shouldn't be a big problem.