Dear Dr. Boil: Is there anything written that is beyond parody? If there is, how would you know that it’s not just in poor taste? If it is beyond parody, what can you do to recover from your exposure? —Sincerely, Stumped in Steubenville.
Dear Sir or Madam: It goes without saying that parody is beyond parody, unless it is very bad parody, in which case the single joke in the metaparody will be that the parody is not funny, and that sort of joke wears thin quickly. Indeed, most kinds of humor or comedy are immune to parody for the same reason.
Parody thrives on the serious, the well-intentioned, and the self-important. Whenever a piece of writing shows that the writer had a higher opinion of it than readers do, it cries out for parody. And that is almost always the case: few indeed are the works of literature whose authors have not had a higher opinion of them than their readers had.
Of serious works, then, there are few that are beyond parody. But such works do exist, and they are invariably the works that are their own best parodies. The works of Amanda McKittrick Ros are beyond parody, for example, because no parody could ever hope to equal the sheer unlikeliness of the original.
But what other works of serious writing are beyond parody? Surely Dr. Boli’s readers will have some opinions, and together we can compile a useful list. Readers should be warned, however, not to include Dan Brown on the list. It has been conclusively proved that Dan Brown is not beyond parody.
As for the rest of your question, taste that is merely poor is always subject to parody. It is only the egregiously awful that places itself beyond parody, and the best way to recover from exposure to it is to eat chocolate.