Drawbacks to Library 2.0?

I think you hit the nail on the head when you talk about library services being about "USER DRIVEN NEEDS." Certainly at FSU what we're learning is that we have to reach out to the customers and meet their needs where they are; it's not just about waiting for them to walk into the library and hoping they like what we already have.

There are certainly many positive results to using Web 2.0 technology in the library. Have you ever run across any drawbacks? You mention that your school blocks Facebook and MySpace. Do you feel this is a necessary protection against sexual predators, cyberstalkers, cyberbullies, etc.?