I’m sorry to say that I think you’re stuck while the father is being so useless. If his view is that his daughters role in life is to moon about until some guy comes along to take care of her, and she is also of the same view, then I think the best you can do is to be supportive of anything that gets her out of the house (including useless studies) and exposed to more of the world and different world views. Hopefully she’ll come to her senses and husband can then support her in her new choices. You have the sympathy of a random internet stranger.

Father of a daughter here. I think your husbands position is deplorable. I want the best for my daughter, and education gives her choices. It sets her up to be self reliant. If she chooses to go trad wife (can’t see it) then that’s her look out, but at least she’ll be to change her mind if she wants to. It’s much harder work to get these choices back in later life - get them now!

I think it depends on whether it’s active or passive. Active - e.g. a laser that damages a camera sensor, then yes, your device is actively damaging someone else’s camera - deliberate property damage. Passive - e.g. reflective strips so the exposure is bad, a pattern that is hard to focus on or similar- that’s fine - camera owner is making a decision to expose their gear to the environment. Even if, say, it’s a changing pattern that deceives the autofocus into working constantly (no, I don’t know exactly how that would work, but it’s the best I can think of at short notice) so it wears out faster.

Good good, carry on!