I think you might have been a bit "hard" on the poster. I can read and have been dealing with reptiles for more than 20 years. To my knowledge, pine shavings, aspen shavings, cypress mulch, etc. all pose the same issues of many shredded substrates - injestion, which can lead to impaction. Most of the time this type of substrate passes without issue.
Have you ever watched the Sutherland's video. Did you notice what they were feeding on? I'd say they can read and might have a clue. 
There are many breeders large and small that use these types of substrates, and yes, feed on them as well.
As for the original post, I use newspaper. It's easy to use, clean and not expensive. It also avoids some of the possible complications that come with the substrates mentioned above.
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Jay A. Martin