Let her carry on, Gaga has already addressed her and I really doubt she cares, she's too busy selling out arena's and a #1 selling perfume to be bothered about 'Madonna the Harridan'.
They'll kiss and make-up in sometime, Madonna is just using this as a gimmick to entertain her crowd as her performing is clearly not doing the trick.
You do realize that Madonna is selling out stadiums and her tour will be the highest grossing?