Would it be considered gauche to use hashtags on here? Are they even supported?
They are supported because people expect them to be supported. They are useful in some cases.
Theyre supported but no one uses them. I don't ever see the point. Infact the word Hashtag grinds my gears.
When used properly, hashtags can be awesome but they are often abused, so I understand your (and other's) dislike of them.
They're very _Diaspora_. Which is fine by me. I can see its use, but it's not very lean. It makes every posting look like a tag cloud. I like the simplicity of Sublevel. It's minimalistic.