Does anyone know of any adverse ramifications to setting the system profile "PO:Validate GL Period"

We are considering setting this to NO because it appears this will then allow us to create reqs or POs in an open purchasing period even though the corresponding GL period is NOT opened, and we could then send the journals - unposted - over to the GL and have them sit & wait until the Accounting team wants that GL period opened and is ready to post.
But we are unsure if there are negative consequences or ramifications we should be considering before proceeding to set this to No. Any feedback appreciated!!