Menachem: Respectfully, I don’t understand why a picture of the Rebbe is a thing. I’m referring to in general, like in weddings halls and other general events, where it is very common to find this huge picture of the Rebbe. I know some Rebbes (i.e. Satmar, etc.) were completely opposed to anyone taking their picture, let alone hanging their picture up. But I’m not talking about that. I know many frum people keep pictures of Rabbonim in their homes. But it is rather unusual anywhere outside of Lubavitch to hang a picture in all general facilities, events and areas. Let alone such a huge photograph.
Pictures didn’t much exist for the thousands of years before George Eastman started Kodak. Since when did it become a mitzvah or even a thing that seemingly is carried out with such religious fervor?