Long was an outspoken voice on LGBT rights within Romania, participating in a controversial Bucharest conference on "Homosexuality: A human right?" organized in 1995 by the Dutch Embassy and UNESCO – the first public discussion of LGBT human rights in the country. He was a founding member of the Romanian gay and lesbian organization Accept. His documentation was crucial in persuading the Council of Europe to strengthen its stand on lesbian and gay issues, and to demand that Romania repeal its sodomy law. His work spearheaded a European campaign and contributed strongly to Romania's eventual repeal of Article 200 in 2001.