Truth through sign language

As Ukraine Watched the Party Line, She Took the Truth Into Her Hands

This is an amazing story, mostly because it centres on an act of genuine personal bravery. But it also demonstrates how, if you're going to be a censorious media monolith, you need to check everything that is aired. Signs have a way of leaking out.

There was a nice story (I think in Wired, but I can't find it now) about how the designers of (again, I think but am not sure) Melrose Place snuck subversive designs into the clothing and props. One was a dress with a design that was basically the chemical formulation for the morning after pill.