Actually the trail is a self sustaining dynamic system habitable by humans that is so long, that one round is exactly 20 years of travel time long. Enough time to birth a new generation on the tracks so that the killing won't stop.
After birthing the infants are placed directly after the train which runs through their mother so that the cycle of endless suffering may never stop.
To enforce this really, decay of a nuclear and of a sub nuclear level don't exist, just as quantum fluctuations don't so that there truly is no escape.
"Hold up. Why have I been put in this situation? Where's those responsible? Has anyone gone after the bridge guy, the brakes guy? Is anyone trying to get the sick fucks tying people down on tracks? What's being put in place to prevent this? Fences?Cameras? E-brakes? Who has liability and are they getting investigated?"
"Just Shutup and choose."
"I guess B is most logical."
"Oooh, you're a sick murderer and just want people dead!"
It's hard to participate when most people only have an A/B, us/them, left/right, right/wrong mentality view on things when it's obviously more complex when viewed from a few steps back. It's being stuck in either yard or on the fence, but if you climb a tree you'll realise there's many more yards and fences to the street to consider.
There's no dilemma. If the goal is to express disapproval to people, then do what people think is disapproval... Which is doing nothing covered by some acting to appear as trying to do something
Do you even know what the rest of the people on the tracks will do if you stop the trolley? You will be responsible for what happens to the trolley operators and passengers.