Amok
Colonists on Mars will live under special circumstances, possibly causing phychic problems. There might be the risk of somebody is running Amok, endangering the whole colony. This risk and the implications can be mitigated by some precautions.
Psychic surveillance
Periodic tests and group training can help to counteract psychic conspicuities in an early phase.
Technical precautions
The Fail-safe principles are mandatory for buildings and vital systems.