EMI shielding without shield?
I worked for a company that put ground layers at top and bottom and stitched them together all round the board perimeter, trying to make a Faraday cage. The product still radiated a lot. 
Turned out to be the 68000 chip die was radiating through the plastic package which was picked up by the adjacent power cord and emitted from there.
I think EMC follows Murphy law: for some reason it always radiates where you do not expect it. 
You should have been suspicious: if it was that easy to solve EMC everybody would have done it. :-)