Aubrey Cottle, a founder of the activist hacker collective Anonymous, warned people in a Reddit AMA to secure their internet account with a two-factor authentication.
Answering a question about social media security, he said that along with open discussions, metadata sourced from people's "social webs" and geolocation data can be used to map out one’s life.
Aubrey said that the most common security mistakes that people make are “weak and re-used passwords”, and that they should use offline password vaults to store their passwords.
He also said that the next generation of hacktivists should tackle issues like “privacy rights, big data and monolithic megacorporations."