This is the side of Spellcrafting that tends to freak people out. Like all energies, there are positive and negative applications. But, as long as Hexes are used to affect to deserving people, such Spells are not categorized as evil. The most important thing to remember is that you must be absolutely sure that the affected party has it coming.
Then there's the question of Karma. If you fear some sort of Karmic retribution for requesting a Hex, please keep in mind that any negative Karma associated with such a Spell will always be associated with the Caster of the Spell. Luckily, our resident Hexologist (that's a proprietary term) Stephenie Crowe knows how to deal with the negative effects of Casting Hexes.
While these Spells can make life unpleasant for their targets, it is doubtful that any actual harm will come to them. Still, when perusing the Spells below, please be completely sure that the person you have in mind deserves the effects of the Spell that you order.