ranvirsm said:
How harmful are these cookies
Cookies are messages that web servers pass to your web browser when you visit Internet sites. Your browser stores each message in a small file. When you request another page
from the server, your browser sends the cookie back to the server. These files typically contain information about your visit to the web page, as well as any information you've volunteered, such as your name and interests. Cookies are most commonly used to track web site activity. When you visit some sites, the server gives you a cookie that acts as your identification card. Upon each return visit to that site, your browser passes that cookie back to the server. In this way, a web server can gather information about which web pages are used the most, and which pages are gathering the most repeat hits.
cookies can be a security threat.If cookies are enabled and if any other user tries to
access the cookies he can easily view what the previous user had accessed.
*en.wikipedia.org/wiki/HTTP_cookie