TOP TEN FRIVOLOUS LAWSUITS BROUGHT AGAINST AOL America Online is the target of more criticism than ever since its decision to adopt a flat rate plan. What with the unilateral decision to enroll everyone in the higher basic rate and the interminable busy signals caused by people staying online longer, the Virginia-based online giant is ticking people off...and sending them to their lawyers. You've heard about some of the lawsuits that are flying at Case and company, but here are some that you may have missed: 10. Malicious littering of magazines and mailboxes with sign-up disks. 9. Negligence in allowing Microsoft and Prodigy to beat them to a flat monthly rate schedule. 8. Cumulative psychological trauma brought on by the relentlessly cheerful "welcome" message. 7. Coaster Advisory Board claims unfair competition. 6. Woman in Florida sprains shoulder hurling AOL disk into trash; sues AOL for medical bills. 5. The official portrait of Ted Leonsis is culpably flattering. 4. Mental injury caused by the tedium of Steve Case's monthly letter. 3. Permanent tinnitus caused by modem signals that AOL software won't let you mute. 2. Failing eyesight and wrist strain caused by unrestricted chat room access. 1. Mental distress caused by discovery that Trixxxi in Flirt's Nook was really a man.