For those of you who don't know what I mean by 'activations', there is a limit to how many active PlayStation 3's you can have, this means if you run out and want to re-download content on a 6th PlayStation 3, your out of luck.
Now you may think, 5 activations is a lot, but consider this. You bought your first PlayStation 3, it got YLOD, you forgot to deactivate, bought another, then traded it in for a Slim
Many people shown their dislike to the ability to NOT remotely deactivate a system. Just to provide an example, the PlayStation Share site.
There is also a petition regarding the issue, I highly encourage you to sign it at http://bit.ly/cbKGb3