If you think that benefitting from someone else's misfortune is immoral, even if you weren't the direct cause of it, then I guess you'd have to say it's immoral.
But we all benefit from the exploitative trading arrangements that underpin our western way of life and if we aren't worried about a few million starving Bangaldeshis and the destruction of the rainforests why would we care about our neighbours whose lives have been ruined by repossession?
Is it legal? Yes - so why worry? Morality went out of fashion with Jesus.