There is a very nice principle for designing web sites. It sound likes this: "Do not ask from user more than you really need".
I often remember this principle when I go to download sample chapters of free demos from web sites. Many of them ask for lots of data. Why, for example, they need to know my social security code or phone number? Or why do they need my e-mail if I want to download the sample chapter? Do they want to spam me?
I usually refuse to give such information because I...
