The Magic Circle exists because clever magicians exist. What they do is fool those not in the know, so as to make a living. Anyone taken in by them is not necessarily gullible but cannot enter the mindset of people who would work SO HARD to con others by pulling the wool over their eyes. An amusing joke when it is only entertainment. My view for may years was 'maybe they mean well but don't understand they are wrong.' Even when Ray Franz himself wrote to me and gently sought to correct me, I was still inclined to give them the benefit of the doubt.
But WT leaders knew they were conning us and Watchtower's false teachings (like magic tricks with word and crafty social engineering) are not entertainment, they are death-dealing blasphemy.