Don't Go There

"Keep Behind This Line" the warning says, because going on the wrong side of the line could kill you.

It's like the line between conflict of interest. Someone (only theoretically) is employed by the school and at the same time operates a review center for passing the entrance test given by the same school.

Or a teacher requires proper lab outfits during his class and also owns a uniform shop nearby.

Or someone gives a high recommendation to a friend to work in the school when she knows professionally that the friend isn't qualified.

No one is watching us all the time, so we think it's okay to go over the line sometimes, blurring between personal and professional principles.

You might think you won't get caught because it's dark, but the train isn't going to be the one at a loss if it doesn't see you there.