(1) If the system changed so that marking observation Captive/Cultivated didn’t send them to iNat purgatory with defective observations that lack locations, photos, etc., this would be an interesting and fairly important question but trivial as far as iNaturalist functionality goes. Everyone who has commented on this topic should go to this link and vote! https://forum.inaturalist.org/t/make-captive-cultivated-not-automatically-no-id-needed/112/25
(2) I can’t see a difference in the status of Wind Cave bison fenced by a physical fence and wild Yellowstone bison fenced by the invisible fence of being shot if they leave.
(3) If @raymie votes a population “captive” and you disagree, you can vote it wild and call all your friends to do the same. This would seriously annoy @raymie and be much less efficient than resolving this issue for everyone, but the option is there.