Congrats on one year tomorrow Didge
Like BD said - it touched you - it was completely involuntary, completely random and completely out of your control.
We have enough responsibility keeping our own side of the street clean - that you got involuntarily involved in someone else's mess is regrettable, but not your fault.
My advice is let it go, mate - enjoy yr bday. I understand you feeling annoyed, but I don't see that it takes the gloss of your achievement at all.
Again, well done
D