We’ve got these things called “social media” that are built expressly for the purpose of influencing people to buy more stuff (literally in the name: influencers). And if it can get people to part with their money, you can be sure the same tools can be used to get people to vote against their own interests.
We thought the internet was a tool to spread democracy. We were wrong. The Internet is a tool used to undermine democracy, so long as people using the Internet are not strongly inoculated against organized interests, foreign, and domestic.