 Zappone akanga ari mutsigiri akakurumbira wekambani yeHongu muIrelands Marriage Equality referendum, inoratidzwa pane imwe nharo yeRTÉ Primetime, ichibatsira YesEquality semupi wezano wekuzvidira, kutora chikamu munhaurirano, uye kuita mushandirapamwe wekuvhota Hungu. Musi wa22 Chivabvu 2015, akataura nezvekuti anotenda sei kuti vanhu veIreland vaizovhota Hongu kuenzana; yeRepublic of equals, Republic of love. Musi wa 23 Chivabvu 2015, Zappone akakumbira mukadzi wake Ann Louise Gilligan mhenyu pamhepo kuti amuroore zvakare muIreland ikozvino kuti yakanga yavhota hongu kune kuroora kuenzana. Iye akarondedzera kuti akanga achinzwa kunzwa kwokunzwa kubva kumusoro kusvikira kutsoka dzangu. 