My favorite is the online name censoring in video games. Dark Souls infamously just does a straight check of any string match within the name against a big list of no-no words. So in this fantasy game where everyone is running around as a knight, anyone who has "knight" in their game will appear as "k***ht" to other players.
There's also a famous image I've seen online from another game where the guy's name was Nasser which appeared for everyone else in-game as "N***er"
There's also a famous image I've seen online from another game where the guy's name was Nasser which appeared for everyone else in-game as "N***er"