Banks are not doing merchant processing for most people. Having some sort of reserve to guard against chargebacks is incredibly common in the industry; PayPal, however, is known for going completely over the top as the article and numerous commenters indicate.
Meh. As the author does, he finds another option. I'm not yet convinced that Paypal's shitty service is illegal, but I'm sure if it got bad enough, someone could reasonably argue theft or extortion.
Point being: The precedent of putting Paypal under the behemoth of banking laws/PCI/Frank-Dodd is more frightening than people still willing to do business with them getting shafted. Dare I say, if it were easier and less regulated to move money through the interwebs, Paypal wouldn't be an issue.