"Privacy concerns" was the (bullshit) response I got. I'll grab the sauce;

Lawrence Garcia, an attorney for the City of Detroit, said that the windows were partially blocked because of concern voter information could be wrongfully revealed to the public. Those concerns were compounded by the fact that protesters standing outside the ballot-counting area were taking photographs and recording video.

"Some -- but not all -- windows were covered, because poll workers seated just inside those windows expressed concerns about people outside the center photographing and filming them and their work," Garcia told CNN Business. "Only the media is allowed to take pictures inside the counting place, and people outside the center were not listening to requests to stop filming poll workers and their paperwork."

K.