Moodle and Web 2.0

"(...) The moral of this story is that you should build bridges instead of walls. You'll never be able to keep people out by restricting their freedom of movement. People are social and have a deep need to be together, so walls are stupid ideas. Once you build a wall you have to maintain it. If you don't it will fall down, and while it's up, Banksy and his mates will draw all over it. So you need to put even more effort in to maintaining it than you did in building it in the first place. That's why Hadrian's Wall eventually crashed to the ground in 1989, and people from both sides crossed over, embraced each other, and got very very drunk together (I think you're confusing this with the Berlin Wall. I'm calling a halt to this post - Editor)."