Iv seen posts with people substituting rape with r@pe. Other than bypassing filters I can’t see a reason to censor just 1 letter that doesn’t actually censor the word? I see if you fully censor the word, but even still context completely ruins the censorship.
Some proprietary social media (looking at you meta) have filter, removing any sensitive topic. So if you write rape you can’t post while if you write r@pe you can.
The ridiculous result is that a health-educator talking about sexual health and condoms will get censored while a teenager twerking in underwear won’t.