Gwen said, "I think we should get out of this hallway before someone discovers our nocturnal activities."

The old man discovered Cindy's activities and blew his stack.

A year later the state security police discovered his secret activities, and he was sentenced to a year in prison for organizing illegal groups.

Eventually, the school's authoritarian dean (Arkin) discovers the students' activities and decides to prosecute.

During this incident he also killed the original Judge Giant, who had discovered his activities.

"You couldn't possibly have discovered our activities in time to defend against it."

The Germans had discovered his spying activities and had sentenced him to death for espionage.

Authorities in the Atlanta area discovered Cox's activities, and eventually his identity.

If he pushed things too far, then he'd only succeed in having his activities discovered and then halted.

When the second Red Guardian discovered Phobos' activities, he was forced to abandon his school.