What would be interesting is a completely serious NDA that looks like a normal one but through clever use of language totally invalidates itself to have no authority whatsoever.
For the record the penis jokes in the Google Doc are not from me :) I think that there were a few subtle funny lines in there - but I can see where you're coming from. Incidentally even inserting one joke into the NDA completely invalidates it so this definitely wouldn't be legally binding at all which is another benefit.
I must be missing the humor, but beyond the slightly interesting 'scavenger hunt', how is it at all interesting to read through a boring NDA for random silly bits?
Oh I just thought that would be a fun addendum to the point of absurdNDA which is to to send a meaningless and funny contract back to someone who sends you an NDA. Most of it is standard boilerplate legal copy, but a few minor things are changed to be funny so the person who gets it won't suspect anything, but you'll have a good laugh.