It would be cool to be able to set communities to 'read only' so I could read the comments, but replies would be disabled or would pop up with a 'you have set this community to read only' warning first to discourage myself from engaging. This would work for a lot of LGBTQ+ communities where I don't have anything substantial to add the vast majority of the time, but am still interested in learning. The read only part would help to keep me from goofing up when tired/stoned/drunk.
Not worth development time though, since the same outcome can come from self control.