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I agree that the super delegates, since they exist, should exercise their best judgement to the extent possible. That would include trying to understand any possible "Rush effect". Some exit polls may indicate that, especially in Mississippi, but I don't know if it's been accurately measured.
My understanding is that super delegates were created for two reasons 1) guarantee that party officials always had a role at the convention 2) be used as possible override against popular but "unelectable" candidates. This makes them a reaction to the messy '68 and '72 conventions.
Ethically, the idea that the passions of the masses need to be tempered starts with the Founders. It's one of the reasons we have a house and a senate, and that we have a constitutional republic, not direct democracy.