Since it's artificially crafted character, it's not part of unicode, therefore the transmission of the character will be through images, so to ban this characte

Since it's artificially crafted character, it's not part of unicode, therefore the transmission of the character will be through images, so to ban this character it's no different from banning Winnie the Pooh pictures, by using state-of-the-art deep neural networks to classify images. To avoid the ban, one has to use the most common characters which must be statistically insignificant to computer recognition programs, like how most network apps obfuscate their traffic to https.