I'm not sure what the claim or charge would be. While I wouldn't feel comfortable participating in political campaigns for democracies of other countries, and I would feel defensive about attempts to influence elections in my country, in the end these 'attacks' rely on actual citizens to vote, so the citizen still holds the power and makes the final decision, so I don't think it's an issue of critical severity, and I don't think it's illegitimate to try to persuade citizens of another country to vote in such matter at a constitutional level (excluding specific laws), even if I personally would feel icky about it.
Now there may be other potential issues that would elevate the matter, if disinformation is used, or if personal information about citizens is obtained illegitimately, then they could constitute crimes in their own right. Whether the crime is aggravated by its intent to subvert the democratic institution would be a legitimate question, but without the accessory crimes, I don't think political campaigns from non citizen actors are themselves illegal, just icky.
>Now there may be other potential issues that would elevate the matter, if disinformation is used, or if personal information about citizens is obtained illegitimately, then they could constitute crimes in their own right.
Both of those happened. And are still happening.
This is algorithmic behaviour modification using sophisticated psychological priming that most people - including people who consider themselves educated and rational - have no defences against.
It very much was, and is, an issue of critical severity. CA and Nix specifically sold themselves as election fixers, but most people using FB would have been completely unware they were being influenced.
The thing that's really disturbing is not how far Cambridge Analytica actually got in terms of influencing American voters through the "campaigns" they were hired to perform. In the end it was hard to assess how much damage they did.
But that's not the real problem here.
The problem is that it has been demonstrated how ad-tech infrastructure can be re-purposed for political propaganda, disinformation, and misinformation. All of that power is now available to the highest bidder, and the infrastructure providers, as we are now know are utterly amoral, stronger and faster than any government regulations, beholden to their shareholders and nothing else even if the world burns.
Disinformation was used and it is NOT a "potential issue" that merely "elevates" the matter, it's profound offense that requires a harsh and comprehensive response.