Does a 20 amp GFCI outlet on a 15 amp circuit pose an inherent danger?

I'll start by acknowledging that I know this violates NEC. As I understand it, the reason that a 20 amp outlet can't be connected to a 15 amp circuit is that someone could potentially connect a 20 amp device, overload the circuit, and cause a fire. That makes sense.
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[@rafaelcouret]

You are a smart man, sir