And what would be their purpose? Recruitment?
As at the March for Life, homosexuals should simply have marched as parents or proponents of children but alas, it doesn't serve their agenda.
Might be amusing to see that radical anti-gay anti-American preacher that likes to have his minions stomp on the flag at anti-gay rallies (and whose name escapes me at the moment) try marching in a Gay Pride Parade and see if the ACLU tries protecting HIS freedom of speech.