It's been going on for for than 40 yrs. Back when I was a wee tad in the 50's, our next door neighbors - right across the hall - were Card Carrying Communists.
My first hint that something was up, was when their son, my age, said God doesn't exist, neither did Jesus, and the Crucifix was 'just a piece of wood'.
Shortly there after my Mother got a visit from the FBI and asked her to help them keep track of who went in and out of their apartment. She agreed and the G-Men would come over about once a week with pictures of people. I even met the 'G-Men'. They even gave me ride to school one day and one showed me his gun, that was waaaaaay cool.
And I kept my little yap shut. But then even I noticed the parents acted weird, especially the Father. It was an uncomfortable situation knowing what they really were.