User Activity

I understand that you can block bidders, and cancel bids on auctions if someone's feedback is questionable (ie: lots of 'not received' and unnecessary negative feedback left), but what protection is there against BIN sales? From what I understand if ...
I shipped a parcel to France on March 20th, and I was emailed on Friday to let me know it hasn't arrived yet. I sent a polite note to the buyer explaining that I was sorry for the delay, and thanked him for his patience while he waited for his parcel...