Some people are very creative in what they do. I give them credit for effort and creativity even if it something that should not normally be done. While at a recent Ohio home inspection I found it again. The example of that is in the home attic here where the former home owner created a pulley system to open and close one of the gable vents.
The problem with this is that attic should always be ventilated, especially in the winter when condensation can become a big issue.