Sometimes necessary to disable instant messaging services on a network. If you need to prevent Gmail users on your network from chatting then you can easly block this by disabling chat from your gmail account

Multi Login in Orkut is easy now with firefox ,No need to logout again and again to login different profiles all you need is to install a simple userscript with the help of greaseymonkey in your firefox browser and after this you can login multiple orkut profiles in firefox.

By default there is no option to auto reply youtube videos but you can do add auto reply option simply by using firefox addon .

Auto replay – This addon adds an auto replay checkbox in Youtube video page along with options to choose the portion of the video to be replayed.

Its not possible to stop friends to tag your Photos but you can prevents other users from finding photos tagged with your name using a simple facebook setting. Choose that setting, and other users won’t be able to search for photos of you