group deletion without confirmation?

As an owner of the group, when I click an "Delete" action button I would expect the System asks me if I am sure what I am doing and asks me to confirm the operation. Assume I have a group with hundreds members, discussions, videos and files and 1 accidental click can remove this everything?! There should be a kind of warning before deletion... IMO not only when I delete a group but when I want to delete anything in the system (photo, video etc.)