Cheap surveillance system

I got this idea because I grew tired of frantically going to the door everytime I heard a noise. When getting "baked" paranoia often happens and this helps a bit. Instead of running and looking through a peephole everytime I hear someone coming towards my door I have made a cheap surveillance system that works quite effectively. I simply attached my web-camera over the peep hole (along with a lens that magnified the view) and then plugged the web cam into my laptop. Now when i watch TV and I think I hear someone coming I just have to look over and theres my screeen. It works and its really easy to set-up. Gosh, we Americans are getting more and more lazy everyday.