Rasputin isn't a troll, he has given me great advice in regards to some issues I had with my rat. That being said I do agree with everyone else's opinions, I had one that really didn't dig much, and was puppy dog tame as well. I did though provide her with the appropriate substrate, so if she wanted to dig she could. I also made her underground hides that she just loved, and I built her enclosure my self. It took up about half my bedroom when I lived at home with my patents, they thought I was nuts.
Now just because an animal doesn't want to do a natural behavior, it doesn't mean that they shouldn't be provided with the opportunity to do it. It's our job as owners to provide them with proper husbandry, this is the responsibility we as humans take on when we take an animal out of the wild and choose to make it a pet. To do anything less is inhumane.