“…The likelihood that a victim of defamation or invasion of privacy will recover damages at trial has come to depend in considerable measure on whether or not he or she is to be regarded as a "public figure" (Prosser, 1984, chap. 20;Bender, 1984;Pember, 1972). In becoming a politician, novelist, or movie actress, one deliberately seeks the public spotlight and, accordingly, voluntarily accepts a degree of intrusion into one's private affairs.…”