(under plain reading of BAPCPA, attorneys who provide bankruptcy assistance to "assisted persons" are included in definition of debt relief agencies; but, 11 U.S.C. § 526(a)(4) which prevents debt relief agencies from advising debtors to incur debt is unconstitutionally overbroad as applied to attorneys; advertising disclosure requirements of 11 U.S.C.§ 528 are constitutional as a means of preventing deceptive advertising).