Some of today’s computer hackers are driven by money, but some of them do it as part of a social activist agenda. They are known as “hacktivists,” and one of the largest hacktivists organizations is called Anonymous. Their members wear masks to remind people of the original Guy Fawkes who tried to overthrow the British government 400 years ago. Anonymous recruits members from around the world — and they want you to join them. This is Volume 5 in the “Technology Today” series, a collection of Tilley’s newspaper columns that appear each week in Florida Today (Gannett).