The ability to read another person’s thoughts by looking at them.

It would be less efficient, but people who are deaf-blind can access the Internet and communicate using a refreshable Braille display. In-person they can communicate using an interpreter using a special sign language.

Also: this is community-specific.

Many subreddits were fantastic about not tolerating insults or disrespect.

I expect the same here - some Fediverse communities will be a free-for-all with insults, some will be a welcoming place for people to disagree without getting insulted.

It’s not anyone’s goal to impose one set of rules of decorum for the entire Fediverse.