Wanna be invisible?

These holidays i was in front of my computer most of the time; always signed in on gmail and yahoo messenger. I prefer remaining invisible on the chat engines, because of the huge list of people online all the time. The people keep changing but the number remains constant at about 20. So you keep getting chats throughout the day. Not that i dont like chatting; thats what i do most of the time, but, you cant keep chatting all day, right?
Gmail has also added the invisibility feature recently. And i was wondering the other day how it would be if i could really be invisible!! A thousand pranks creeped into my mind! ;)
I would leave even my computer too, to play pranks on others all day. Also you could know lots of secrets by being invisible.
You could top in all the exams ;by getting the question papers beforehand ;) ..You could get into any restricted area, get into concerts without tickets...and above all scare the hell outta people ..haha...would be real fun!
But then, on second thoughts you would perhaps see and hear a lot of stuff you would never want to experience. You may hear people, maybe some of your closest friends, speaking ill of you, and you would wish you never heard anything or saw anything. People wouldnt always have praises for you, and you would hear a lot of sad things. You could also end up witnessing a lot of miserable sights too.
I decided i would be happier with my invisibility limited to the chat engines. :)
What do you think?