Recently I read that in France (where I live) there is this rule that all online sellers selling to customers must pay VAT even if abroad.
Someone pulled a trick along the lines of: taking orders from customers then ordering stuff on behalf of the customer, then claim "we don't sell stuff, we just order things on behalf of the customer", and then the other seller is not ordered from by the customer so by the book they are also not concerned by VAT (so in the end no VAT is paid)
And it seems it was confirmed being legal...