[Fins]

Gorbachev and Reagan, sure. Even Brezhnev and Carter. But by then you'd have to tell particularly strong ones to get sent to a labor camp, unlike under previous regimes.

[the_grue]

Well, I was born in the 80's, so I only witnessed that. However the famous Soviet "kitchen conversations" existed even before that.

[Fins]

Kids these days...

I am sure there were kitchen conversations even under Stalin, but to far less extent -- most conversationists ended up in some unpleasant places.