Riefye and the Crowd Isn't Happy.

Plutarch says the experiment having failed, that makes it clear that he thinks this was a set up. If they all say, put it on or clap, then he'll be wearing a diadem which is pretty close to declaring youself king. But because they don't do that, they're still holding on to this republican constitution. 500 years is not long enough to get rid of hating kings in rome. They sort of quietly put it away and think, ok, we're not going to try that again.