If the original authors uploaded it to Wikipedia, then they GFDL'ed their parody, so we most certainly can make use of it...
If we can use it under GDFL, then we have no problem. This whole discussion is about the fact that BJAODN violates GDFL by not attributing the content. If someone goes through the attributes everything they can and deletes the rest, then there is no copyright issue - that's the best solution I've seen so far.