It is quite funny and IMO in good taste (which is hard to do when diagnosing 9,625 out of every 10,000 as deficient). It probably works well as an in-joke for people who prefer critical thinking to social proof.
But it isn't really appropriate to fight fire with fire when it comes to calling people disordered and the people who need to hear the message won't understand it because they key off social proof. In fact, they may literally not understand the gentle ribbing and might respond poorly.
3/5 stars.