@hollie @ansate @Matt_Noyes @CaitlinWaddick @edumerco @dphiffer @django @ktoddbrown @MarieVC I use them for a few other things (#BikeNite, mostly). They're always public, but the benefit over hashtags is that you get *every* post to the group, even if you're not normally federated with the server of the user who posts it. You can also use alerting rules (ie. always show a notification when this user posts or what not) which I don't think you can do with hash tags