I would add that you should not do anything on the internet that you can do anywhere else, especially online commerce. I work with companies who are all about exploiting the data that we all leave behind when we're online. Profit is not the only motive for the people who lead them. A surprising number of these folks care only about learning what can be accomplished with technology, and the profit comes later. There are relatively few Mengeles among them; most just have the moral compass of a boy pulling the wings off of flies.
Okie John