Entire nations, continents, and possibly even whole planets are at risk from Epsilon-level threats. Possessing abilities and/or influence to shatter civilizations, nations devote vast resources into anticipating and countering such beings before their machinations or rampages cause irreparable damage to a planet’s social order, political stability, and/or physical well-being.
Such a threat cannot be held within standard containment facilities, requiring specially prepared, often unique conditions for long-term confinement. In the most extreme cases, practical containment is impossible, and more extreme (permanent?) solutions must be found.