How about this? If these radical Extinction Rebellion protestors want to stop trains, perhaps they should foot the bill for the lost revenues to MTR Corporation? Perhaps companies should claim back lost productivity?
Moreover the danger they put others in by their actions. Without a doubt they’d be the first to complain and seek compensation if they were injured while being removed. Try not putting yourselves in that position in the first place! Absolutely unnecessary disruption and misuse of emergency services.
Normally protests require approval from the local government, insurance and coordinated police protection. It is unlikely that stopping trains in this fashion would have passed the application stage.
These people should be arrested, charged and heavily fined. Alas, they’ll be arrested, given a tap on the wrist and be released.