Hello how day!!
As they say on Ciggerette packages, "smoking is injurious to health", sajha does not come with any disclaimers regarding its consumption. However, excessive use of sajha can be hazardous to one's well being. Too much of anything is bad and it applies to sajha too. If used in moderation it can provide entertainment, information and togetherness. Excessive use can start to have diminishing returns.
I don't recommend anyone to use sajha for over 2 or 3 hours a day. Life presents one with choices in all aspects of life and in order to lead a fulfilling life, I think one has to participate in other aspects of life in addition to the virtual world.
Procastination is a very serious issue specially when you're in college. The urge to be online and postpone getting started on that 10 page paper or exam due tomorrow is very high. Please don't screw up your grade and your future potentials by being on sajha too much. Sajha is not going anywhere. It's gonna still be there when you're done with your paper or exam. There are other important things in life such as a social presence. So if you have been ignoring your presence in society please take a minute or two to look a little more presentable and go out to meet someone you know. For a fulfilling life, it's important that you socialize and interact with other human beings outside of the internet.
Being on sajha 24/7 is not a good sign at all. Do create some other options to spend your time. Call someone up and spend an hour on the phone catching up. Go to Starbucks and read a book with some latte.
I hope you don't take it as an unsolicited advice but I wish you well.
Best wishes for a happy new year 2008, where hopefully you will cut down on your sajha time!