Well, it seems that the Mike Arrington’s pointed critique of social marketing practices is getting even the very large players to move quickly.

Today, we’re adding a fifth principle that clarifies a specific use case that we feel is particularly damaging to the user experience: promotions that include hidden renewals without specific opt-in will not be permitted. Because it’s our belief opt-out offers are misleading and do not have the best interests of the users in mind, we will be updating our Terms of Use this week to better clarify this for users and developers.

via MySpace Says Zero Tolerance For App Scams, Changes Terms Of Use

There is a simple principle at work here. Visibility is key. There are many shady things quietly going on on the Net today.  Once someone shines a big, bright light it becomes harder to hide. Everything starts with visibility.