Good point, though I would argue (and have argued here: http://swombat.com/2010/12/19/dark-patterns-good-for-busines...) that in some business sectors, like, for example, the ultra-competitive registrar market, dark patterns are a necessity. If you don't use them you will go bankrupt. So before you discard dark patterns, make sure you're in a business that can afford to do so.

Also, things that were considered dark patterns in other types of businesses (e.g. supermarkets), like laying out the shop in a way that will encourage you to buy more stuff, are now considered standard business practice. Will that happen to these patterns too?