Part of the social-network-portability effort.
Many social-network-portability sites provide the user the capability to "block" or "ignore" other users of those sites, typically because those other users are stalking, trolling, harrassing, or behaving negatively in some other way.
The "block list" effort documents how current social networking sites are handling these interactions in the hopes that this research can be used for developing a portable block list that a user could privately share with other sites (probably via oauth or OpenID or both) so that they could block a troll on one service, and have the troll automatically blocked on other services as well.
When this section grows too large, move it to: block-list-brainstorming and leave a link in place.
When this section grows too large, move it to block-list-issues and leave a link in place.
Does a block list need to represent levels of animosity? Most examples in the wild are binary: either someone is blocked or they aren't (unlike XFN or other buddy list taxonomies that allow for degrees of intimacy and clarity).
Couldn't this be an addition to XFN then, or would it be out of scope? --AlexandreSolleiro 16:36, 27 Oct 2007 (PDT)
It's not clear, since XFN has a strictly positive/neutral scope, and the use-cases (and user interfaces) of friends lists and block lists are so very different. In particular, so far, the research on block lists shows no taxonomy at all. Just a simple list of people that are "blocked". Therefore that should perhaps be the basis of a first attempt at a microformat. Tantek 23:06, 27 Oct 2007 (PDT)