That's foolish. Ever since it was introduced people knew that email was not private. You should expect that everything you put anywhere is going to be read by spies. That's why spies exist; to gather information.
You use that as part of your risk assessment.
"Will I be sentenced to death or torture if this document is discovered?"
"Will I go to jail if this document is discovered?"
"Will my company lose business if this document is discovered?"
"Will I be embarrassed if my terrible teen-angst poetry is found?"
Then you decide how much effort you're going to use to hide the information, or the source of the information, or both.
While it's right that governments shouldn't be wasting money slurping the data of everyone it's unlikely to be an argument that the public will win any time. And even when there are laws "They" will find a lawyer to tell them that what they're doing is legal, and no-one ever gets to take them through court to show that it isn't. Oversight fails. You should assume a well-funded government is reading everything[1] all the time. I suspect that makes more of a difference if you're in $Oppressive_Regime than in the US or UK.
And if people really did care why would they dump so much stuff onto Facebook?
[1] see the mistakes that people make with creating encryption products, and using those products, it's probably a good idea to assume you've made a mistake and this government can read everything even if you encrypt it.