DARPA is hardening our infrastructure. They just did a bunch of anti drone experiments in San Diego it was in the news. There were even some UFO articles written about it.

I am aware of some DARPA projects that actually focus on improving infrastructure. I'll edit my comment if I can find a link.

While not having infastructure needlessly vulnerable to hacking is generally known as not being a goddamned idiot be very cautious of "misinformation campaign" protection beyond critical thinking and auditability as a norm.

It is one thing to somehow get any news agency who even tries to be reputable to sign their stories, the government to sign their official publications, and people to expect anything claiming to be them to actually prove it.

Allowing anyone the authority to enforce "blocking misinformation" for "national security" is a concept tailor made for a use. My Lai and Tiananmen Square would be "misinformation" while antivaxxer bullshit and "if you vote with a relative in jail you will be arrested" style misinformation would go untouched because it would be born an instrument to be abused for power.