The least thing Twitter could do is allow us to see who started a specific hashtag. Hashtags can be pushed using Tweetdeck through private accounts.
In 2016, @jack asked which feature we want to see https://twitter.com/jack/status/814537990366228480
I replied with "ability to see who started a specific hashtag" https://twitter.com/maram5e/status/814720800024621060
@jack thought it was interesting and mentioned VP of Product at twitter. https://twitter.com/jack/status/814721829273292804 I got excited, but nothing happened.
I got excited because I thought I would in no time be able to, not discern the truth, but identify whether I can trust the source. After all, there is a name for content which does not identify its source: Grey propaganda.