I have been talking about wanting the social networks and web 2.0 companies to create a do not disturb button option, that would prevent anyone from being able to contact you. They couldn't poke you, ask to be your friend, etc.
It’s a basic account setting, right on your main settings page:
“Invites: Accept Invites from other Xangans - yes/no”
Here’s a quick description:
It appears that Xanga already had one. :-)