Before_destroy return false, but dependent are destroyed

Rails
1

I have a problem with before_destroy deleting by dependent records,
even through I return flase.

…
has_many :users, :class_name => ‘Editor’, :as => :editable,
:dependent => :destroy
…

def before_destroy
unless self.has_access?(99)
errors.add_to_base “Destroy permissions error!”
return false
end
end

When I remove the dependent => :destroy and put users.destroy_all it
works ok.

I use rails 1.2.2. ruby 1.8.5, win32.

Best regards,
Tom