Allegations of inappropriate workplace behavior by Charlie Rose, broken Monday afternoon by the Washington Post, are startling and dismaying in and of themselves. But the effect is compounded by the sense that Rose’s persona — that of a too-avid lecher — was on public view before the allegations came to light. Just as 30 Rock joked about Bill Cosby or Seth MacFarlane jibed Harvey Weinstein, John Oliver’s Last Week Tonight had made sport of the uncomfortable dynamic on CBS This Morning, highlighting what the Oliver show called the “breakfast-time foreplay” of the show.