Honestly, I did wonder about about in some way locally tagging all the people who did not get the joke for my own benefit - not to say they are untrustworthy per se, just that they are colossally dense.
There is this little known feature called "Ignore". Works brilliantly as a shitposting tag.
Having said that, I rarely use it. Every day is like April Fools with these folks. I like cheap amusement.