Yes alibaba is a theives market. Alibaba does little to root this out too. Moreover the entire china small items trade competiveness relys on the rediculous postage rates (low) that allows delivery in the US for a mere $1 worth of postage. Finally all the small vendors lie about the item in the postage to evade customs charges.
The same happens when I buy on eBay or Amazon Marketplace.
Lot's of Chinese vendors there that ship from China.
Also, US vendors lie on the customs sticker as well, if they care to put that information on a package at all.
I live in Germany and I order from all around the world, Every time I need to go to the customs offices to pick up a package because it was not declared properly it's a package from the US or Australia.