I've came across a few postings on local HK discussion groups that certain individuals are letting their travel companions to use their MPC numbers so that they can extend their DM/GO/SL privileges to them. One guy even showed off pictures of his BPs with duplicated DM MPC numbers and two CX comped buggies with all his friends on it.

For example, lets say there is a party of 6, usually the DM can bring in two guests in addition to himself to the first class lounge at The Wing, and the other three can't enter. However, if the DM's MPC# is entered again in one of the travelling companion's record, the system will indicate this travel companion is also a DM on the boarding pass - therefore allowing the remaining three pax to enter FCL.

Surprised that CX is allowing such behavior. Guess its a further depreciation of the MPC program.