Justaminute:
Whether something has a chance of being implemented should not be a bar to its introduction for discussion.
Whatever the reason for the penalty, removing a checker from the board is a penalty that does NOT occur in all checker variations. It doesn't occur in chess or most other games where a player may choose not to make a move to capture an opponent's piece.

The point I was making was not to show an approximate comparison. It does show that penalties exist in other games. You do not have to agree with the penalty I propose or that there should be a penalty.
My suggestions on a draw rule are not part of the game yet it is being discussed by several others. Though the addition of a penalty is not a part of the game, it too could be discussed and either rejected or accepted.
I make no apology for suggesting it.

There has been no suggestion made that the rule would require any kind of program change other than to add the text to the rules. The 50-move chess rule is not programmed. A player who calls a draw in chess based on the 50-move rule sends it to support to call the draw if the opponent declines the draw offer. The same would be the case in Espionage for either the draw or the penalty.