Since dark money no longer has to be registered, no only would the "Yes on 3" team send out a "No on 3" flyer, it would have a wrong explanation of what 3 is, and give really bad reasons for voting no, so even if you did read it, you'd still vote yes (a no vote will raise taxes on seniors and veterans and give the money to corporations) and hope voters don't check outside sources.
In the kind of advertisement I'm talking about there is no correlation between the imagery and the policy. You'll have a stock photo of a worried immigrant mother holding a child and the proposition will be about something like rezoning a light industrial area for mixed use.
My universal response is "some bastard is trying to hustle me with stock photos"