Digital Citizenship is a concept used by educators to help teach parents and children appropriate ways to act online and use technology. A pillars of digital citizenship is respecting one's own privacy as well as the privacy of others.
Government of Canada's site to educate Canadians about cyber security and how to behave online. This page has a section directed at both parents and youth, but whose advice is generally applicable to anyone.
Check out the Digital Citizenship course, with topics ranging from Digital Footprint to Digital Etiquette, and Digital Safety and Security. This is a great course for basic information on how to use technology respectfully and appropriately.
Media Smarts is an organization dedicated to promoting education, public awareness, and research and policy studies on media and digital literacy. This specific page includes information on the cautions of using the Internet and mobile phones.