[collyw]

You really don't see the benefit in being social be to the people around you? It doesn't have to have an intimate relationship.

Do you just ignore the people you work with as well for similar reasons?

OK, one reason off the top of my head. Say something suspicions is going on outside your flat. Someone that could be checking out your house wanting to break in. A friendly neighbor may go up and ask in a non threatening way if you were expecting to see John in just now, and could he take a message for you. Ignore your neighbor to the point he doesn't even know your name, and guess what. He won't give a shit. Which scenario is more likely to get your place broken into?