If it's PC, then I usually don't care if someone comes to look at my screen. Although, if it is something I'm working on or typing up that I just don't want anyone to see then I usually just switch to another program I have open, or I open up a next tab to another site such as my homepage, Google, or maybe just another tab to PC. Usually, this doesn't happen to me, but the most times it is to occur is when I'm on places such as my e-mail or Myspace. I just dislike it very much when people come snooping behind me to see what my friends and I are talking about. My sister has a habit of doing this to me and it gets annoying. I don't have anything to hide from anyone, it's just that I don't go snooping into someone else's business so why do they need to look into mines.