I just remembered that in the story "Simulacron-3", there is ostensibly a law requiring people to respond to opinion polls. It is illegal to refuse.

https://en.wikipedia.org/wiki/Simulacron-3

Spoiler: gur jbeyq va juvpu gur ynj fhccbfrqyl rkvfgf vf n fvzhyngvba, perngrq ol be sbe cbyyfgref!