This technique is what ultimately caused the Utada school became a cult people felt compelled to hunt down and exterminate. The masters of the Utada style developed a number of rituals that translates loosely as 'Sin Eating' - they would mark themselves with certain ideas or emotions and become consumed by them so long as the written word was intact.
Lust was considered the most powerful human emotion, and they forced their students to undergo rites and orgies to fuel that power. They would also abduct people, mostly young women, and enslave them into a life of prostitution to make money. They could also drive those whose blood they took to acts of violence and rage. But the worst was a written curse you'd call 'Apathy.' The victim stops eating or drinking and wastes away over a week or two.