It should not be difficult to find evidence yourself though. Just pick one person who has added lauda to their trust list; there is a ~1 in 9 chance of it being a clearly purchased account, and from there it should not be difficult to find the rest.
The burden of proof is on the accuser. You make a pretty shitty case if you can't provide such, and instead tell people to find it themselves.
There is no burden of proof in the court of public opinion. This is just a smear campaign although I do suspect there may be some small truths to some of it.