Cool. I have epilepsy actually. I had my first seizure in 8th grade and a few after that until I was diagnosed around my freshman year of high school ~9 years ago. Personally, I have not had a problem with kiai but the degree and severity differ from person to person. I am medicated but some others may not be not, therefore having a higher chance of having a seizure. I'm pretty sure that I'll never have a seizure because of osu! but like I said it differs depending on the person. However, I don't see anything wrong with being able to disable it; so I support.