To gain an exemption or deferment, many men attended college, though they had to remain in college until their 26th birthday to be certain of avoiding the draft. Some men were rejected by the military as 4-F unfit for service failing to meet physical, mental, or moral standards. Still others joined the National Guard or entered the Peace Corps as a way of avoiding Vietnam. All of these issues raised concerns about the fairness of who got selected for involuntary service, since it was often the poor or those without connections who were drafted. Ironically, in light of modern political issues, a certain exemption was a convincing claim of homosexuality, but very few men attempted this because of the stigma involved. Also, conviction for certain crimes earned an exclusion, the topic of the anti-war song "Alice's Restaurant" by Arlo Guthrie.