There was an April fools' joke going around that scientists had discovered a moon orbiting Mercury and they were going to shoot it at an angle that would bring it to Earth.
WHAT IF this was a real proposition? How would you feel about it? Personally I'd be furious that scientists were playing with things they shouldn't. Problem is, there may just be a time in the future where something like this may actually come about. Scientists decide to do something stupid that the population doesn't want. Rumours would flood social media on the effects - good and bad - of the decision.
So we'll go with the Mercury moon. Scientists are going to blast it off its orbit and it's going to reach Earth. They list a variety of reasons why it's a great idea - it will allow them to study moon and learn more about space. The alarmists will start talking about the impact causing the end of the world. Realists will question just what potential disasters this choice will bring. People will rally. Some will just sit back and watch the chaos.
Where are you on the scale? Would you rush about preparing for the end? Would you get out and rally? Would you tell everyone who'd listen to calm down because the scientists know what they're doing?
The problem is relying on people with power not to do anything stupid. Of course, that's usually the most interesting part to add into your story. Think about how the people with power in your book add to the story world, and see if you can get them to do something really, really stupid.
Just a little something for your Monday mind to munch on.