In my 30 + years in a Big Airline or since, I can recollect no incidents/accidents caused by an F/O calling Stop. Surely if you are P2 in a two crew flight deck your training should cover all possible scenarios in the event of incapacitation, We covered Co pilot 2 Eng handling and Go Arounds on the B747 Conversion.
It all seems faintly foolish to see airlines not confident in their co pilots ability to Reject a take off or even taxing, which I witnessed when jumps seating in the USA, some years ago.