Hmm, it probably couldn't hurt to try. I sprouted my Darlingtonia seeds in pots about that deep, or a little deeper. Once they put on mature pitchers, I moved them to something deeper, as I'm an advocate of overpotting. I would use a drained container, myself, but if you've got an account of someone using kitty litter trays and you think you can make it work, give it a shot. I imagine you could do a lot of seeds in a container that size, and it doesn't hurt that they're inexpensive and easy to find. Let us know how it turns out - it's always good to learn about new growing methods.
~Joe
PS - One thing I can say is that you should avoid translucent containers - algae and pests will grow in the moist, well-lit sides of the pot. They'll also heat up more easily, and Darlingtonia certainly won't appreciate that.