AOL's new boss, Randy Falco, may not know how to use IM, but The TV industry veteran is an impressively bloody hatchetman. Among the rumored casualties from today's layoffs at Time Warner's AOL online unit, four senior managers, pictured left to right: Joe Redling, John McKinley, Kevin Conroy and Jim Bankoff, the AOL programming head. (Update: Jason Calacanis says, below, that he can't believe the company would let so many senior execs go at once.) It would certainly be a mistake to let Bankoff go. He brought in Weblogs Inc., Jason Calacanis' stable of small web titles, one of AOL's more successful acquisitions; and he's the exec credited with the investment in TMZ.com, Time Warner's highly popular entertainment news site.