True. Just because “language is descriptive” (descriptivist will always let you know) doesn’t mean everyone can go freestyle with language, carelessly introducing ambiguity and miscommunication. They always say “as long as it gets the point across” but as a non-native but still pretty fluent, most of the time they don’t actually get the point across.
Mastodon doesn’t natively support groups so we just use another protocol (such as chirp.social) so we know by seeing the domain name.