How to block sites

Haii friends i think all of u r familiar with facebook,orkut or hi5.....n u may had faced problems while someone bloked them ...i will give u a short demo on how to block and unblock the sites 

Step 1: Click the Start button and select Run. Now type the following text in that Run box:

notepad c:\WINDOWS\system32\drivers\etc\hosts

Step 2: You will see a new notepad window on your screen containing some cryptic information. Don’t panic. Just goto the last line of the file, hit the enter key and type the following:

127.0.0.1 orkut.com
127.0.0.1 facebook.com
127.0.0.1 myspace.com

Save the file and exit. That’s it. None of the above sites will now open on your computer.

You can block as many websites as you like with the above technique. If you want to remove the ban later, open the same file as mentioned in Step 1 and delete the above lines.