social networking with my library?

Social networking. What a great way to be exposed to thousands of people you'd never want to meet. Social networking could possibly work for libraries if they were comparing notes on how they do certain things to save time etc. But other than that i think we may - just may - be able to live without it. I had a look at The National Library of New Zealand and how they are using twitter..I don't really know if it's all that necessary. If they are trying to appeal to a younger generation (as one of them) i can safely say that if i did use twitter, i probably wouldn't be all too interested in being chummy with my local library. I think social networking should be used as a purely social thing. not exploited by businesses etc. I think libraries do an amazing job sans twitter. However the UQ catalogue via facebook, i must admit, is clever. I dare say i'm not going to go and have an adventure by signing up to a social networking site - as i already am a member of several and the passwords are just too hard to remember these days.