That happened to at least one grandmaster...
he wound up playing himself at correspondence chess. For money. And realized this was going on.
What he did was to deliberately make a series of stupid moves, such that by deviating his opponents could both get huge material advantages. They took the bait, and he went on to win both games.
I forget which grandmaster this was though.
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)