"Cheating" is not the only form of survey bias, nor the only one that you might or might not need to control for (which is not the same as "modelling out"). But then again, I'm thinking as a technical person, and at the end of the day all this would go in the small print at the bottom which no politician ever reads, and that's them who are going to look at your survey at the end of the day.
Indeed. But as I said I don't have the time or resources (I no longer command a staff of 2000) so we had to make do the best with what we have.
I hope those participating understand the importance of doing this honestly.