What the engineer did in the video was wrong. Very wrong. He is lucky nobody got hurt. On the other hand, what the person filming the incident did was wrong too. Instead of videoing it and sending it to the news, he should have contacted Metro-North and let them deal with it.
In today's modern world, everyone and everything is watching. If you do something wrong, chances are you WILL eventually get caught. So how do you avoid getting caught? By doing the correct thing in the first place.
Looking "at the big picture" is very important too. Taking things out of context can be very misleading and cause unnecessary trouble. As Mr. Railnut mentioned earlier, it may look they let a passenger operate train, but it could later be showed that engineer had a student that day. I cannot tell you what was going through the mind of the engineer when he was reading, nor can I tell you what the guy videoing the event was thinking either. Nobody can.
The most important thing needed here is common sense.
If you see something that can potentially threaten life or limb, such as seeing a suspicious-looking package someone left on the train, or looking through the window and seeing the engineer fast asleep on the floor, then tell someone. Don't let this incident make you shy away and go back to your seat hoping someone else will notice. If you are that afraid of getting in trouble for something like that, call 911. They will know how to handle it.
On the other hand, if it is something that will not potentially threaten life or limb, then let Metro-North know later. There is no need to cry to NBC because the engineer didn't blow the horn at the proper time or your train stopped 6 inches further up the platform than it did yesterday. We live in an imperfect world, and everything cannot go exactly as it is supposed to all the time.
This whole fiasco reminds me of the NJT 7277 Sideswipe thread that degraded into the nonsense thread over there. That incident was sort of similar. A passenger on the train heard what he thought to be two trains sideswiping each other one day. Instead of alerting the conductor, he went to Railraod.net and told everybody there. Meanwhile, those two trains could be out roaming around in NJ Transit-land with a dangerous defect that could endanger trainloads of people. Luckily, nobody got hurt. But what could have happened? If there was something severely wrong with the train sets, they could have sideswiped again on another run, but this time, instead of just jolting a couple of people around in their seats, there could have been catastrophic damage to the trains and their passengers. And all of this could have been stopped if the train crew was alerted, the situation checked out, and any potential issue resolved.
So what could have happened here? On Monday that engineer could have been back on on his run, reading his newspaper as usual. But this time there could be someone roaming around on the tracks and instead of noticing and stopping the train in time, he strikes the passenger. Then we are looking at this topic from a whole different point of view. "How could that engineer do that?" "Isn't he supposed to know he should be watching the road?" "Didn't anybody try to stop him?". In a way we are lucky this guy will stop, even though we may not be too pleased with how the discipline came about.
There is no way now to take back whatever has been done with this incident. I cannot magically make everybody who saw this video and heard of this incident forget about it, so we have to deal with what is done. What the engineer did was wrong. What the passenger did was wrong. Two wrongs don't make a right.
In conclusion, I just hope that this incident can serve as an example to everybody out there that the only way to avoid another issue like this is to operate the trains in a safe and correct way, because everyone is watching. I would rather arrive at my station 6 minutes late than not get there at all. Don't break the rules because you need to get back on time or you woke up late and just have to see how the Mets did last night. The rules are there for your safety, my safety, and for the safety of all the passengers as well as the people who live and work around the railroad tracks.