Why do some people appear to have no common sense?

Because people are.

They are lonely and sad and they don't know it but they are.

They think there so popular and just become like this.

One person starts it then the others.

I don's know why ever why spend there time drinking when there's a beautiful world out there where they can go Bowling or swimming.It's sad there sad

they think they got nothing to do so they hang round parks and pubs.