Luigi Mangione’s known handle on Reddit was Mister Cactus. The account was nuked by Reddit almost immediately after his arrest in Pennsylvania.
Many subreddits related to Luigi Mangione have also been banned by Reddit. These include:
https://www.reddit.com/r/luigifever/
https://www.reddit.com/r/MangioneCommunity
Huh, apparently you can't say "Luigi was right" on Reddit or you get banned for a week.
TIL
— GlassTurtle (@GlassTurtleOG) February 10, 2025
Currently still active subreddits discussing LM and his case:
https://www.reddit.com/r/BrianThompsonMurder/
https://www.reddit.com/r/LuigiMangioneJustice/
https://www.reddit.com/r/LiberateLuigi/
https://www.reddit.com/r/FreeLuigi/
https://www.reddit.com/r/LuigiLore/
https://www.reddit.com/r/Luigi_M_Letters/
https://www.reddit.com/r/LettersToLulu/
https://www.reddit.com/r/Degenerates_for_Luigi/
https://www.reddit.com/r/TheAdjuster/
https://www.reddit.com/r/LiberateLuigi/
Privatized subreddit:
https://www.reddit.com/r/Luigi_Mangione/