New signs for unauthorized filming?
Did something happen to prompt these being made?
ETA 2: Seems like there could be multiple causes. Meta glasses, incidents of disruptive and invasive customers acting technically within the law, etc.
ETA: This was probably because of a specific incident of a black man recording his own running videos in the far end of a Meijer parking lot.
Race relevant as he was not breaking Michigan law with his recordings and it is thought to be racially motivated scrutiny.
The placement of the signs isn't even going to address the issue taken with him as they are to be put on the doors; most people will understand this to be prohibition of filming in the building.