By that standard, voting is impossible. There was plenty of outside influence in favor of Remain, too, including the President of the US campaigning in favor of Remain and threatening trade war actions if they did Brexit, and I don't think it would exactly a fair characterization to say that the EU itself quietly stood by and waited for the will of the people of the UK to be revealed. Votes will never be hermetically sealed from the outside world.

The apparent spending violations are probably a stronger case for the vote being tainted.

Outside influence doesn't invalidate a national referendum. If Russians convinced Brits to leave the EU, that still means that Brits wanted to leave the EU.

I'm not saying to let them do as they wish, but on the face of it, you can't call it a perversion of democracy. It's a perversion of communication networks.

You need to prove that. It hasent been.

Proving in court will be hard. But surely you've seen the smoke?

Then there is really no case. Even smoke need a place of origin if you can't even point to that and show how it was done not just by circumstantial evidence but actually shoving the data to support it then it's just guessing, in this case highly biased guessing.

Brexit is no different than what is seen in many other places throughout Europe, a fight against globalization so unless Russia has developed some magical abilities to mind control large parts of Europe and the US which no other nation in this world is able to copy then I would say that the smoke you see is our own.