The Fairy Kingdom is tough on its approach to offenders. Officiallly it hates the misuse of magic though Eileen has had grounds to question this in the past. The realm will not hesitate to execute those who have threatened it in any way and Eileen has carried out these executions. In fairness to her she has had absolute proof of the guilt of the beings concerned.
Magic has been used to try to contain a threat but the only problem with this is when dealing with someone clever and powerful enough to overcome those restrictions as that is what they do. Overcome said restrictions and cause more problems for the magical world.