Fate and people

I think fate may be playing games with me. I used to have some neighbours (OK, i still have neighbours, but not this pair). In all the time they had the misfortune to be my neighbours, I think I spoke seriously to them once, and that was to exploit them as keyholders while I was on holiday.
Since they moved out, I appear to be bumping into them on a weekly, and almost daily basis. I wonder if fate has something horrible planned for us?