When someone like Scott Ritter wants to travel to Russia to speak at a conference, he isn't technically aiding and abetting the enemy because the US has not declared 
Russia to be an enemy (despite all that has happened so far). But if he was a former intelligence agent, restricting his travel is understandable.

But the kremlin spokesperson has now called the United States an enemy nation. I do not know if that is equivalent to declaring war. But if the US declares war on Russia, my language about this conflict will change because under wartime, free speech can be far more supressed and and consequences for speech can be far more serious, and I'm a practical kind of guy that doesn't walk in front of tanks (no disrespect to Tank Man). Call me a coward, I'll call myself "still alive".

Anyhow, here is my question.  Russia has sent ships to the Caribbean to do "drills".  But Russian ships in the Black Sea have been somewhat easy to sink with surface drones.  Couldn't the US sink Russia's ships in the Caribbean with Ukrainian-level low-tech surface sea drones?  That would be kinda funny if the US did this and acquired the drones from Ukraine.