Is it possible to make a post on the Fediverse which:
is publicly viewable to all,
doesn't necessarily get delivered to my followers' timelines, and
is delivered to everyone following a particular hashtag?
I have lots of interests and would like to toot more about them: railways, FOSS, standards, politics etc., but I don't want to spam all of my followers with stuff they're not interested in. I could create multiple profiles, but that seems like a crude hack - is there a better way?