Were there people initially deemed as crazy for shouting that hyperinflation was coming?

Hyperinflation was not an effect many people could foresee. The opposition party tried to warn about this, but with the ongoing war between the official party and the Other Side, fake news was rampant. Relying on information coming from one side or the other was challenging. That is the main reason why the inflationary tsunami caught (almost) everyone with their pants down. 

The reality was that the trust level in the official party and their censorship diminished to negligible levels, where it remains until now.

That beings said, most of the economists had a good idea about what could happen. When they talked about our economy, any predictive bad news was credible. Our purchasing power had started to erode steadily in 2012. I noticed some alarming indications during this time.

Were there societal signs of hyperinflation?

Another indication of hyperinflation was the treatment given to the people suddenly called "hoarders" by the mainstream media. Some of these "hoarders" were indeed resellers looking to make easy money, but I am sure some others were only people looking to build up a pantry, just like any of us.