As I was being pushed back yesterday the tug driver told the captain and I that he was in deep ****** with the TSA. There was a CRJ200 with its door closed sitting waiting for a crew on the ramp on a busy Thursday morning at D concourse. Apparently the TSA violated him, and the company for this, as it posed a security risk. They are going after him and the company for a $15k fine! Anyone who has been to ATL during the 8am to 10am rush knows the rampers are running around hectic and I sincerely doubt the aircraft's security was ever an issue. Obviously I don't know all the details but it still seems ridiculous! Just my 2 cents...