All I will say is this.
It all boils down to character.
If he knows that he fouled, he should have come up himself and have said that the last two shots should not have counted, because he had fouled. Poor character there.
Second, it isn't the whole fact of 'remember, we are having fun here'. Yes, we are having fun, but the integrity of the game should not be sacrificed for the sake of 'having fun'. As league bowlers, we hold ourselves up to the rules of the game. The moment we don't do that, we not only lose integrity of the game, but what does that also say about we, the bowler?
It comes down to (and this is more of a life lesson than anything) doing what is right, regardless of being portrayed as the bad guy, or feeling like hell about it afterwards. Yes, the guy may feel shattered, but he would know, as well as everyone there, that the right thing was done.
And there would be positives to take out of it. He now knows he can throw 12 in a row, if not more. So he then now knows that he could do it again. And again. And again. But throwing him a bone on one while everyone else has to throw 12 true does not make for anything fair in the game, and calls it into disrepute.
BL.