If HN has some sort of redirect to any URL page (eg, redirect.ashx?url=http://www.google.com http://www.google.com I don't know if HN does but a lot of sites do

If HN has some sort of redirect to any URL page (eg, redirect.ashx?url=http://www.google.com http://www.google.com I don't know if HN does but a lot of sites do in some form) then it could be exploited possibly