It is reminiscent of the aftermath of the Nixon debacle and resignation. For years after Nixon had left the national stage, writers and media types gleefully and gratuitously would include snide insults and sideways shots at him, without reason or purpose, other than to enjoy doing harm to someone they hated.
Expect that the same thing will continue with Palin, now already six years after return to private life and with no likelihood of ever running for anything again. You will still see this kind of drivel for years from now.
There is no hate that endures like the hate of a leftwinger.