Clicking a button? I don't see how that could drive anyone 'crazy,' but hey, I'll take your word for it. :/
No, clicking a warning that comes up constantly, especially at the worst possible times (during meetings, etc)
Yep. In the security center, click on the button/link that says something like "Change the way security center alerts me."
I don't remember seeing that option before. But, I tend to ignore the links at the left, because usually they're shortcuts to other places that I don't really want to go anyways. This is the first time I've seen an option there that I couldn't change in a more logical place. Ohwell, that's one less annoyance