[Apanage]

Bet/fold is best against a majority of players.But a thinking TAG would identify this spot as being one to do something similar to a value/bluff raise on river.And we also have the half retarded that raises without realizing why it can be a good spot to raise. The cost of being up against those players is enormous since you lose the whole pot but against the other players you´re winning a bet only occasionally.
That being said I still think the players that raise the river with a lesser hand is so few that bet/fold is OK.
But it is a dangerous habit to bet/folding scary rivers.
If you done this against me I would have written a note about it before the next hand was dealt since I don´t have to be Einstein to put you on an overpair.