That website describes that.
TLDR Spoofed characters look like normal characters but they're not and, unless automod has a filter for them too, it won't detect them.
ImaginarySaffron
joined 2 years ago
F̫u̖̲͚̜͈̻̻̖̥͆ͧ̈̀ͫͣ͋̆̚c̰̠̦̯͈̝̠̭k̩̦̝̲͔͓̬̻̪͖̂͊ͦ̇́̈̔̇̐̚ ̻̦̙̹̖͙͈̻̼̣̗͈̽ͪͮ͗͐ͯͧ̿ͭ̍̈́ͨ͐ͅS̯̺͖̳̺̮͖̘̲̫ͧ̓͆͗̀̋̉̓ͮ͒͒̚ͅͅp̹̘̬̗̦̙̞̱̟͖͇̿̃̔ͬ̇̅ͫ̏̈͆̚e̳͙̮̻ͯ̽̅̄z
It's sad. Now, because of people like those mods, even other mods on reddit who don't deserve it are going be harassed.
Power Delete Suite and manual deletion.