Iris here, reporting back from a weekend activity with a dual alpha couple, my brother (ILE) and sister-in-law (SEI.) The SEI asked their two children if they would like deflectors to prevent gutter balls. The children, both NFs ages 15 and 11, agreed to the deflectors. Grandmother, an ILE and notoriously childish bad sport (although very mature in other essential areas) also requested deflectors. The dual couple opted not to use deflectors. The SEI was the top scorer, serenely bowling strikes and spares every time. My ILE brother, beset by a host of real and imagined difficulties, bowled a humiliating 70. The gutter ball deflector crowd averaged around 95. Everyone was happy because the food was good.