SHREDDING of confidential Enron documents was still going on a fortnight ago, according to a former employee. Maureen Casteneda, a director in the foreign investments section of Enron's Houston, Texas, head office, claimed she was given shredded documents as packing material for her belongings when she, like 20,000 others, was laid off. Shredding was still going on when she left in the second week of January, she said.