Blocked sites become unblocked... SO THAT'S WHY MY CHILD BLOCKS SUDDENLY DISAPPEARED A FEW YEARS AGO! There's probably a proxy on my computer. But where did it come from? I don't remember putting it in there...
A proxy, as far as I know, is a site, not a program for you to download. Your parents may have just removed the blocks. I could be wrong though as I don't know much on teh matter. You could read Wikipedia ont eh subject if you want to though I must warn it's probably filled with a bunch of technical terms...