Well, I do understand to a degree why they wouldn't want a question such as "How would you commit suicide?" being asked on the site. It might trigger some people and give way to ideas on how to commit suicide for those who are looking for them. I do believe the topic of suicide should be allowed to be discussed, but you have to make sure that what you are asking is appropriate. There is nothing at all wrong with discussing suicide, but there are proper or better ways to go about it.
Nothing wrong as long as no one tries to commit suicide after that. By the way i wouldn't try suicide. I love being original but probably all ways of suicide are already used and tried so i could not do something special.
I really don't know, I mean in that particular case I think it's just the worry that if you give people ideas on how to do it or an easy way to they will, I read awhile back about some phenomenon surrounding that whole idea, but it really annoys me when people say "something stupid/silly" in place of "kill yourself".