A goy told his Jewish neighbor how much he enjoyed Shabbat. When the Jew told him that he was not allowed to keep Shabbat, he responded that he carried his siddur to shul. “But there’s an eruv”. “I don’t rely on it”.
When the Reformers sued to prevent an eruv, the non-Jewish judge asked how much it would cost the taxpayers, the lawyer for the eruv committee responded that they would pay a rental fee. The judge told him to put up two.