unfortunately I have had multiple people do this in our club tournaments despite it being explicitly written that you have to finish out.
In this scenario, that has not been the case and in fact a precedent has been set in the group of MAX ESC being used so I would have written him down for max or 8 or whatever he wanted and moved on.
In our tournaments several guys have done this purposely to try and get a really bad score not posted so they can keep up their vanity index, but if you play 14 holes you can/should post the score with expected score put down for holes not finished.
In this scenario, that has not been the case and in fact a precedent has been set in the group of MAX ESC being used so I would have written him down for max or 8 or whatever he wanted and moved on.
In our tournaments several guys have done this purposely to try and get a really bad score not posted so they can keep up their vanity index, but if you play 14 holes you can/should post the score with expected score put down for holes not finished.