Terms of Service (refusal to send you a notice) any reason why?

"The Company reserves the right to refuse any user access to the Services without notice for any reason, including but not limited to a violation of the Terms. If you violate these Terms, the Company reserves the right to issue you a warning regarding the violation or immediately terminate or suspend any or all Accounts you have created using the Service. You agree that the Company need not provide you notice before terminating or suspending your Account(s), but it may do so."

I honestly would like to know what happens that prompts this to be changed so they will not send you any notice before dropping the ban hammer on you.