THE ISSUE: Sen. Ted Kennedy's membership in Harvard's all-male Owl Club. Picking on the ponderous Sen. Ted Kennedy is like picking only the low-hanging fruit — it's too easy...... *** ....when he first ran for the Senate, Kennedy's opponent said, "If your name was Edward Moore, instead of Edward Moore Kennedy, your candidacy would be a joke"........ the joke has been on us. Paul Bloustein Cincinnati, Ohio *** The person responsible (for Teddy's dog Splash's name) may well be Ted's old friend and occasional nemesis — John Barleycorn. James Ring Ossining *** Now that he's become a leading anti-Republican attack...