Suppose the train had clearly posted a rule: No cell phones on this train. And suppose there was a very good reason for this rule, perhaps the cell phone interfered with the train's electrical systems.
Now suppose a number of teenagers were on the train with cellphones. You are the conductor. Would you have the engineer bring the train to a full stop each and every time a kid used a cell phone, then toss the kid from the train?
The correct answer to #30 is troll the Urban Feral behind the train until his behavioral ‘rough edges’ are worn smooth.
Remaining in school is expensive and the taxpayers must demand their money be well spent, not wasted on those who are determined not to learn.