Dear #Fediverse app devs (including the #mastodon web interface itself): PLEASE stop autocorrecting my #CamelCase'd hashtags into all-lower-case.
That's just silly. You should be autocorrecting lower case to camel case instead! Grab the list of all hashtags with the same letters without regard to case, and if there's a plurality of them with the same capitalization (not counting all-lower-case), suggest that. Duh! ;)
edit: self-tone-policing. I come across a little too snippy.
It's a very old convention. I first learned of it looking into Macintosh programming in the early 90s, but it goes back much further than that:
In terms of #accessibility, I am told that screen readers can use #CamelCase as hints for how to break up conjoined words. And they're just easier to read in general, e.g.
#iamtheverymodelofamodernmajorgeneral
vs
#iAmTheVeryModelOfAModernMajorGeneral2 (Mastodon won't show the same hash tag twice, funny that)
Wrote this for the hell-site forever ago, but the example of mixed-case hashtags is true here: https://adrianroselli.com/2018/01/improving-your-tweet-accessibility.html#Hash
Twitter persists. Even if you have moved to Mastodon, Twitter will persist. As such, we need to continue to ensure it is accessible to all users. This post gathers some tips you can and should use. Hashtags Emoji Unicode Image Alternative Text Embedding Alternative Text in a Tweet Web Interface…
R. L. Dane 
Coach Pāṇini ®
Adrian Roselli, pH0