I put higher weight on joking than crazy. He might be trying to build up plausible deniability for past/future claims that he really believes in but could get him fired.
I don't think that strategy is likely to succeed. Just look at the criticism that Eliezer got after his April first post.
I think the most charitable reading is that he wants to run an experiment on his audience to see the effect of writing utter crap.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.