Video answer: Dumpster diving for evidence of a spy
Top best answers to the question «What is possible defense against dumpster diving»
Destroy any CDs/DVDs containing personal data. In case you no longer need your PC, make sure you have deleted all the data so that it can't be recovered. Use of firewalls can prevent suspicious Internet users from accessing the discarded data. Paper documents should be permanently destroyed/shredded.
Video answer: Arrested for dumpster diving while rescuing food for people in need