What does this religion say about the situation where someone kind is cursed and hounded by the spirit of someone cruel and destructive? Say, in a situation, for vengence. Or to keep secrets.There are many spirits who will work for anyone who pays their price. Those spirits will as happily harass a good person as a bad one (some of them might even be especially happy to do so!) Being good is not necessarily protection, in and of itself, against evil. While especially good and kind persons may have the blessing of God and the Angels, that doesn't necessarily mean that they will be protected against evil. Consider how many Christian martyrs died horrible deaths in the name of Jesus: they may have received a reward in heaven, but the angels rarely interceded on their behalf against those who tormented them in this world.
The lwa are far more likely to take action against those who harm their servitors. But this typically has less to do with that servitor's morality than with the attention they pay to their lwa. That's not to say that the lwa won't call someone on the carpet for distasteful behavior. Ogou might tell one of his servants to quit being a coward: Danto might warn one of her husbands that he best pay his child support lest she rip off the implements by which he fathers children. But the lwa generally help those who help them, regardless of their goodness or badness.
And what are the suggested remedies?Those who are being tormented by evil spirits can always call on St. Michael the Archangel, who has no problem with giving the boot to demonic entities. There are also a few books which may prove helpful to those suffering from spiritual infestation. Three of my favorites are Basic Psychic Hygiene by Sophie Reicher, Protection & Reversal Magick: A Witch's Defense Manual (Beyond 101) by Jason Miller and Psychic Self-Defense by Lady Dion Fortune. Learning the Lesser Banishing Ritual of the Pentagram is a good start toward mastering the fine art of driving out unwanted spiritual entities. And a Lavé Tet or Kanzo can be an excellent protection against spiritual beings that are troubling you.