It definitely depends. My ideas surrounding consent in practice have changed over the course of the last few years as I’ve grown closer in my faith. I used to believe as others have stated that as long as it wasn’t hurting anyone, I would be fine to cast spells on/for others without their knowledge. Obviously if I was doing baneful magick I wouldn’t ask…
Hey there, you hurt me and now I’m going to put a curse on you. Is that okay?
Now, though, what I would do instead is either get permission beforehand or work that permission into my spellwork. There are some deities out there who would rather their devotees go through the difficult time because it’s part of their lesson, learning process, or Work. If I were to do a spell for this person to get them out of that situation, I would be harming their Work and possibly pissing off a deity.
What I do instead is I work it into my spell by including parameters for the spell to fail if necessary. This would look like saying the spell won’t be effective if [person’s] God(s) don’t will it, or the spell won’t be effective if the [person’s] energy is not in alignment with the spell. This way it leaves it open for the energy I put out to interpret the situation better than I can from afar and without seeing the big picture.
I also see blessings as something kinda iffy now. I am a person who does not want anymore children ever and if someone I know works with a fertility-based deity who is all about pregnancy and childbearing? Yeah, don’t bless me please. Not everyone is going to want the blessings of specific Gods or Gods in general
It’s a lot to think about, for sure, and I think it’s great that you brought up this topic!