Nastier rulers will use what they know about you to push you around. Scrub your computer of malware on a regular basis. Remember that email is skywriting. Consider using alternative forms of the internet, or simply using it less. Have personal exchanges in person. For the same reason, resolve any legal trouble. Tyrants seek the hook on which to hang you. Try not to have hooks.
Individually, don’t put something on a computer that you couldn’t bear to see in the local newspaper. Collectively, support human rights, including privacy rights.
Living ~400lbs 