Following tags on Mastodon is "everything has been said, but not everyone has...
Following tags on Mastodon is "everything has been said, but not everyone has said it", except everyone is working overtime on the 2nd part and virtually no one that posts a tag, feels compelled to follow the tags they post to and to realize what is going on.
Before you post to a #tag , think of the people following the tag.
Self-replies
For example, the #tag tag is actually for graffiti and people talking about the day in German.