He’s pretty clear in the fourth paragraph about one major issue. It only goes on more from there.

> Under Section 1201 of the DMCA, it's a felony to modify your own property in ways that the manufacturer disapproves of, even if your modifications accomplish some totally innocuous, legal, and socially beneficial goal. Not a little felony, either: DMCA 1201 provides for a five year sentence and a $500,000 fine for a first offense.