Chap from up the street...how would you treat him?

[Blackjack Davy]

I get these kinds of people every now and then they want to engage you because they've nothing better to do but you have things to do and a life to lead. Polite but distant smile if you think its appropriate but don't engage more than necessary or they'll tell you their life story / think you're their new best bud and they'll never leave you alone.