This treads dangerously close to the idea of "oh, God created the earth 6,000 years ago with all those fossils already in the ground just to fool us"...

I'm sure noone wants to get into the origins debate, but just a note to set the record straight:

Most biblical creationists believe that creation occured between 10,000 and 6,000 years ago and that the fossils came later during the Genesis flood. I'm not sure who you heard the "fossils already in the ground" thing from, but it's definitely not a representative viewpoint of most biblical creationists.