If the government demanded that we all carry tracking devices 24/7, we would rebel. Yet we all carry cell phones… If the government demanded that we give them access to all the photographs we take, and that we identify all of the people in them and tag them with locations, we’d refuse. Yet we do exactly that on Flickr and other sites. Bruce Schneier, chief security technology officer for British Telecom

See also: The Internet Is a Surveillance State and Beware Trading Privacy for Convenience.

Sketching helps you better understand the problem you are trying to solve and lets you visualize possible solutions. It is a fast and inexpensive way to brainstorm and to test out a lot of UI ideas before committing to one. Sketching speeds us the concept creation and iteration phase and makes it possible to get feedback early on, when changes are easy to make. Lennart Hennigs, Smashing Magazine