While the FUD on Twitter may be highly visible, its impact is ephemeral.
So FUDbusters with a long term view can also turn to one of the world's most visited web-sites, Wikipedia.
Providing non-biased, well-sourced and notable information on topics of interest there will be seen by many, for a long time. Editing on Wikipedia does have a bit of a learning curve, but simply citing a reliable source for some relevant information by copy-pasting existing Wikipedia-formatting is not that hard.
As an example, I have just created a (currently) small article on Oliver Schmidt, the top VW executive sentenced to seven years of prison, for his involvement in the VW diesel emissions scandal:
Oliver Schmidt (engineer) - Wikipedia
This is to provide (lasting) background to a couple of tweets responding to boneheaded FUD regarding 'fleeing Tesla executives' - since it is in fact VW executives who are trying to keep out of reach of the long arm of the law:
Andreas Hopf on Twitter
Happy anti-FUD editing.
Building on this... I just discovered that WikiTribune (new journalism project from Wikipedia co-founder) has some articles on Elon, like this one:
Fact-Checking the public funding that Elon Musk ventures receive
Feel free to chime in and help fact-check the story, I already added the 2015 Guardian article that Elon tweeted.