In all seriousness I feel like the common answers I saw of Diogenes (because that was like, his entire shtick) or Socrates (because they killed him for being annoying) are probably better answers but saying its Trotsky on a leftist forum is way funnier.
I'm sorry but Stirner is just too cool and audacious to be annoying, even Marx was tickled by the mere "existence" of the man
Now his fans who take his theories seriously on the other hand.....
Stirner would bully egoists so hard…