

Thought crimes are very often retroactive.
During Soviet times figures drifted in and out of favour. An old joke:
Three men are sitting in a jail cell. “How did you end up here?” asks one the other. “I criticized Karl Radek,” he says. “No way!” replies the first man. “I got here for supporting Karl Radek!”
They turn over to the third guy in the corner and ask him why he got there. He sighs heavily and answers: “I’m Karl Radek.”
I already started adapting my old joke repertoire!
Two federal agents are patrolling Washington DC. After a period of silence, one asks the other what he thinks of the current leadership.
After pondering what to answer for a bit, the second guy answers. “Same as you,” he says.
“Well, in that case I’m afraid I must arrest you.”