It's true that in the strict sense of the word a theory is a proven hypothesis. However in modern parlance outside of the scientific realm, the words theory and hypothesis tend to be synonymous and interchangeable.
Here's just one example of Wikipedia being compramised.
https://www.newsbusters.org/blogs/techwatch/corinne-weaver/2018/12/04/reliable-source-hacked-wikipedia-swaps-trumps-picture
By Corinne Weaver | December 4, 2018 2:44 PM EST
Wikipedia is considered by many in the media to be “the Internet’s greatest store of knowledge.” But what happens when that knowledge is compromised?
What level of evidence is needed to establish a conspiracy theory?
That's a good question, but the fact is that nothing is ever truly established. In fact it's doubtful as to the meaning of "established" in this context.
I don't think that there's much further with this. I think we should call it a day if you don't mind.