[medstrom]

Don't even have to do that, literally everyone passing them by could have been instructed on what to say, out-of-view.

If there's a solution it's probably something akin to research preregistration.

[dagw]

If there's a solution

Isn't what you're asking for just polling?

[medstrom]

Aren't we trying to solve the trustworthiness of street interviews?

[iso1210]

You can't. They are unrepresentative and meaningless as a means to inform.