According to Douglas Adams, there was once an alien race cursed by telepathy. Cursed? Yes, because being aware of every last fleeting, irrelevant thought of their fellow beings was completely unbearable.
The only way that they could block out the noise was by talking loudly and constantly about nothing at all (or by playing host to a Disaster Area concert).
Watch Twittervision for a few minutes and you will understand how they felt.
