@Tsoo Aye, if there's no alignment hit it won't be so bad. There will likely still be some abuses if they use a path based friendly fire, but I can deal with that at that point.
I agree with making each group as equal as possible in these regards. I just had a huge concern with that (and still do, did you have a source that such accidents won't be ruining the work of people to maintain a good alignment beyond that video?)
I can think of at least a few reasons why no alignment loss would apply while having the friendly fire, from being neutral to not downing to party and beyond. I'd be happy to accept anything concrete, but there is too much speculation with the video to be accepted as such a solid answer.