I'm of two minds on this one. On the one hand a city absolutely should have the right to enforce parking ordinances such as the 72 hour rule which is the standard for most cities. On the other hand $900 in impound fees is more than just a little excessive. Even the decreased $557 impound fees are too high to be considered reasonable.
Something we all need to remember when we're "urban boondocking" is that no matter where we park, we are guests in the area, and uninvited ones at that. As such we need to be on our best behavior at all times. Yes, I understand that the man in the article was having mechanical issues, but mechanical issues do not extend parking limits. As for whether or not they should, the parking enforcement officers do have some discretion in enforcing parking regulations, but that discretion is not unlimited. There comes a point where, regardless of compassion, they have to enforce the rules.