The real solution to the picture thing is to help forge those photos. Create a booth where ballots aren't counted, and let people vote however they want there,

The real solution to the picture thing is to help forge those photos. Create a booth where ballots aren't counted, and let people vote however they want there, and let them take pictures. A picture then says nothing, because the coercer cannot verify the picture. The biggest hole here is that the coercer might follow you into the polling station to see if you use the fake booth.