Well, you can not really prove the feedback is fake or not and so its still unlikely you'll ever get into trouble.
DHGate did start shaping up some now after the recent INTERPOL investigation of their businessmen, they now offer 'WAREHOUSE DIRECT SHIPPING' meaning you can go to the actual source.
The source would be the 'FREIGHT SHIPS', which carry plenty of legitimate products. All at wholesale cost, but it is ON the SHIPS. Things not coming out of the ships, may be just as well an illegal bootleg branded and created in someone's shop over there.
Thousands of those scams and garage sales run all over Hong Kong. But, by buying direct from the 'SHIPPING YARD' you are almost always getting perfect service.