For the last time:
I DO NOT care what the contents of the bag are.
I don't care if they are Nuclear Secrets, Class A Drugs, Alien entrails from some secret experiment, smutty magazines, even tickets to Rhyl. I can see through the bag and can see it is just rubbish. Rubbish. If you are so interested in rubbish, go dive in your bin, or your neighbours bin. Go down the local dump, you'll go nuts there if you like rubbish, you really will.
Will knowing what the contents are stop it from happening? - No.
Will knowing the contents magically explain everything? - No.
All I want to know is who is doing it and why, because it's just completely bizarre. End of.