The reactive factors of regulation of migration show us how individual states intend to react to phenomena related to human migration and primarily harmful for host societies. In this context, migration emerges as a challenge for public security or law enforcement. Reactivity, however, does not only have its origin in eliminating the adverse effects of migration, but also in those responses from the states through which the baselines for regulating migration are demonstrated and reflected. The stricter the entry conditions, the conditions of stay or the conditions on certain work of foreigners are, the more easily it can be demonstrated that, as regards the given communities, migration is not an unreservedly supported phenomenon.