Justaminute:
I'm not too concerned about whether the penalty I suggested is included as part of the draw rule. It has been rare that I've been offered a draw that I declined.

I can't agree with the reasoning, however, that a rule shouldn't lead to different treatment than occurs in another game type. On the contrary, differing rules are what sets a game apart from other games.
Penalties do occur in games for various purposes depending on the circumstances. In checkers, for example, there are variations that impose the penalty of removing a checker if an available jump is not taken.
In some timed chess tournaments there are time penalties for false draw claims and other infractions.
The lack of a penalty for an infraction in some game types does not imply that proposing a penalty for that infraction in a particular game is inappropriate.