Since we're on Reddit I guess you could always just look for subreddits that fit the target demographic. Be warned this is just off the cuff shit I just looked up now but general feeling seems to be pro-draft for both sexes but anti-Draft collectively.
https://www.reddit.com/r/TwoXChromosomes/comments/b0ene/should_women_have_to_register_for_the_draft/
https://www.reddit.com/r/Feminism/comments/4j5cig/what_are_feminists_on_opinion_on_the_draft/
https://www.reddit.com/r/Feminism/comments/4o7lpr/senate_votes_to_require_women_to_register_for_the/
https://www.reddit.com/r/Feminism/comments/17nu1j/i_registered_for_the_draft_today_as_a_woman/
https://www.reddit.com/r/Feminism/comments/4gy6nz/house_committee_votes_to_require_women_to/
https://www.reddit.com/r/Feminism/comments/3dl97u/teen_girl_sues_so_she_can_legally_sign_up_for_the/
https://www.reddit.com/r/Feminism/comments/43xacu/marines_army_time_for_women_to_sign_up_for_draft/