I guess I'm trying to figure them out. Who knows if the way that they are is the way they will remain.
Nevertheless...
Old Glitch - streets (housing blocks) are public to everyone.
New Glitch - streets are semi-public to everyone. You can get anywhere, but only by traversing a confusing web of streets if your friends know the right people, and have added those friends to their signpost. I suppose that a teleport also works, if you bring up a person's profile and get to their street...but that makes it even more confusing, not to mention the TP cost.
So what do you prefer?
1 - Only being able to get to the streets that you are explicitly given permission to? This makes streets private.
2 - Being able to get to the streets of your friends, even without explicit permission? Kinda semi private, but with some control. Non transitive (I can't get to a friend's friend's street, unless I am directly friends with him).
3 - The way things are?
4 - Other?
Part of me thinks that signposts (or maybe street traversal) should be tied in to your keychain. If you have a key, you have a way to get to their street. Whether that maps to a signpost slot or not I'm not sure, but I don't think there should be a energy/token cost to TP to a friend anymore (assuming I have a key). I'd be penalized for an inefficient web of signpost confusion if there was a cost.
I'm still trying to think through the possibilities, so I'm looking for someone smarter than me to tell me the right answer. We all know that there's only one of those :)