The second we see somebody on the street or meet someone, we make snap judgments about them, about who they are and why we wouldn't necessarily sit with them or why we would or what's cool or not cool.
We ought to think that we are one of the leaves of a tree, and the tree is all humanity. We cannot live without the others, without the tree.
Even the 'Today' programme involves a balance between the worthy-but-heavy items with the worthless-but-entertainingly-light ones.