It's not my place to judge your method or intentions but you might have to decide what's more important to you, an undisturbed and successful death or a public spectacle. Revenge suicides seldom have the desired effect. You run risk of hurting or sabotaging yourself and the intended target usually won't even care. It's why they treated said person, you in this case, in such a manner in the first place. Plus, if they mean you truly ill, they might take a certain pride or delight in such an event. Why make it about them if it should be about you?