Crusaders Against Junk Faxes Brandish Lawsuits
Steve Kirsch, entrepreneur who has been waging crusade to eliminate unwelcome faxes, filed $2.2 trillion class-action suit against Fax.com, while consumer advocate Robert H Braver has filed 36 cases against junk fax industry; Congress in 1991 passed law, which, among other things, prohibits practice of unsolicited advertising by fax; photo (M)