I don't know anything about FOX News, but neither the proportion of numbers nor the give both arguments equal time argument sound convincing.

If five Greenpeace activist stage an interesting protest against say Shell I do not expect a proportional airing of peaceful people filling their tanks at Shell stations the same day.

If a maverick scientist trumpets that he sees evidence for a young Earth I don't expect equal treatment just because there are two different opinions about the age of the Earth.

Wolfgang