If it's just a nock with a glowing insert or something then there's no reason that it couldn't work just like a regular arrow.
What is super-evil is the idea that maybe these guys were intentionally taking less-than-ideal shots to show how a glowing arrow knock helps track fleeing wounded animals. I hope that's not the case but some of these shots looked really horrible for the range they were taken at.
yes, shitty hunting is fucking inhumane. A well placed bullet to the heart of a deer kills it dead in a second, and you and your family eat venison for a month. that's awesome. Miss vital organs and you have a gutshot deer running in blind fury until it dies, which can be a long time. That's cruelty to animals and should be a fucking crime.