> You ought not to endeavour to amuse and deceive your adversary, by pretending to have made bad moves, and saying you have now lost the game

I've done a variation of this in a rated game. Like pretend I accidentally touched a piece and now am compelled to move it. Loud sigh. It was effective at least once, both of us patzers. It hadn't occurred to me that I should feel bad about it. I'm not sure I do.