The proposed agreement would criminalize copyright and intellectual property offenses. Under ACTA, Internet service providers would be required to filter illegal transfers of content and help the government track down the people downloading it. Border patrols would gain the authority to seize and destroy copyrighted materials at the border.
And there is the REAL reason the TSA are confiscating your digital electronics at the borders. This has nothing to do with terrorism.
They are just clerks for the record and movie companies making sure you do not have illegal copies of music and video on your hard drives.