I always say this - I never advocate attempting to curse with the influence of dark forces. I sometimes agree to attempting it when higher Divinity is working the mechanism, as a justice piece. I especially believe in it when a benevolent god source approaches you and asks it be done, but that is super rare. Surrendering your magickal will to higher Divinity is an excellent way to avoid creating negative karma for yourself, preventing unwanted magick from even working in the first place.
I expect to get vitriol from both Christians and satanists about this one (if they ever find out about it), but I still wanted to do it.