Following on in this quite fascinating thread, the video wonder You Tube be is full of aviation disasters where two aeroplanes collide on runway, generally resulting in non surviveable incidents.
Now we are not privy to ATC Comms on these postings, however, I would hazard a quess that communication, and situational awareness is probably the cause in a lot of them.
There is never any excuse for runway incursion, without adequate and confirmed communications between participating aircraft. End of.
i.e. confirms by the backtracking aircraft that he is happy, and knows about, the others intentions on entering the active. Everyone happy, and safe