At least its gatorfoam so when the letters fall down they wont kill anyone. Seriously though, I agree theses should have at least one hole / stud per letter. Even then it wouldn't sit right with me. If they are high up on the wall is there any way you could make something that mounts to the roof and hangs down the wall. I agree that some historical building should not have a bunch of holes put in them but we all need to take safety seriously. Furthermore, if they are specing gatorfoam they can't be viewing this as a permanent solution can they?