You will not be committing civil disobedience by not completing the ACS.
You are free to toss it in the trash.
And the Census Bureau is free to send you more letters.
And you can throw those away.
“And the Census Bureau is free to send you more letters.”
The last time around I did the same thing. I completed the ‘number of persons living at my address’ part & sent it in. Later a census taker showed up at our door to get us to complete the rest. Sweetie started answering questions (against my wishes) but he finally got fed up & stopped answering when the questions of how much we earned came up. He said the govt already had that info & told the guy to leave. The guy’s hands were shaking as they spoke.
Apparently he’d taken a lot of abuse from uncooperative folks like us!
We never heard any more about it - no fine.