Yun was an LGBT rights activist, and during this time participated in the abolition movement of LGBT and LGBT related media which was regarded as "youth Harmful media specified"(청소년 유해 매체). At the same time, he always attended anti-war and peace rallies in Jongro, Seoul. Slowly, he became the leading representative in anti-war and peace movements as a guest speaker. Additionally, he participated in an opposition campaign in Seoul which aimed to prevent the government from sending troops overseas to participate in the Iraq war. On April 3, he was a determined participant in the Conscientious objection to military service(양심적 병역 거부). Yun declared his refusal the wholesale slaughter of innocent peoples. Also, he participated in the sex worker rights movement and antidiscrimination movements, sex workers discrimination opposition movements. also with joint to Ableism objection movements.