Personally I think it's nerdishly cool but pretty absurd and bizarre. Like Twitter, Second Life can be (and often is) used for personal superficial reasons, but also can be vehicles to build communities that address important social issues. Some waste time on twitter as a popularity contest, to build as many followers as possible and share every mundane insignificant detail of your life with the rest of the world, while others use it as a tool to build relationships and spread important information across the world. Anyone on twitter in the weeks after the Iran election will remember the green avatars, switching your hometown to Tehran, flooding the #IranElection and other various hashtags to make more traffic for Iranian officials to sort through while trying to locate protesters. Similarly, Second Life can be used to create an avatar that succumbs to all the excesses of life without the earthly consequences or one can use the Second Life character to make statements and connections surrounding important issues affecting the real world.
The people in these videos clearly fall into the latter category. In a variety of ways, their Avatars have taken creative but otherwise impossible actions in Second Life to confront important real world issues. They have taken advantage of the social networking possibilities Second Life offers and, in their own unique way, are taking a digital stand on actual issues...
--Connecting Second Life With Real World Small Organizations
--Second LIfe as an Immersive Educational Opportunity
--Second Life an Opportunity for Satyrical Commentary
--Building Communities with Interactive Experiences