They don't have any fiduciary duty to shareholders. No one knows who they are or what their position is in regards to the shares or whether they've violated any laws. Most likely, they had freedom of speech to say whatever they want.
Merely because no one has sued them, doesn't validate what they said. You can say a lot of bs without triggering lawsuits. Lawsuits are expensive, and tracking people down is costly as well.
Nonetheless, eventually it may be revealed, and in that context, it may be revealed that there is something actionable. Why would they have taken such care to hide their identities, if they did not fear, if people knew who they were, and what they were up to, they might bring lawsuits? Surely, using the anonymity that the internet allows, rather than putting their reputations on the line, was a calculated move, shaped by potential lawsuits and liability...
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