The cookies.txt file will store passwords for future visits and also remembers what you have in your Shopping Cart. Do not store passwords on a lab or non-personal machine. Often your address was picked up when you visited a chat room or commercial website. Some Spam is unavoidable just like junk mail and it should be treated like junk mail. Spam wastes time and bandwidth.
Computer viruses are another class of time and resource wasters.
Normally, they are just pranks intended to catch gullible Internet users. Email chain letters are equal to the chain letters you receive in the mail. E-Commerce Electronic commerce is becoming increasingly popular. The ease of ordering whatever one needs from anywhere in the world and receiving it in a timely fashion results in savings for both businesses and consumers alike. Many companies offer discounts for purchasing over the web.