2 is somewhat correct and always has been unless you run the content re-builders.
Options for deleting are:
Warning: Deleting a member can not be undone.
Do not delete this member.
Delete member and do not alter posts. Ownership will be set to Anonymous with an Anonymous name of: test.
Delete member and delete all posts. If there are any replies to a post by this member, they will be attached to the post's parent. If the user's post is a topic, the entire topic will be deleted.
