Economical? Maybe, practical? No. They'd be noticed either by people seeing them or people /who'ing instances at random(and trust me, they do; anytime a bunch of hunters are in an instance someone pipes up quick, even on Cairne in the first few weeks someone pointed out "OMG LOOK THERES LIKE 40 HUNTERS IN DIRE MAUL RIGHT NOW AND NO OTHER CLASSES" and sure enough, /who Dire Maul - 40 Hunters with random names and random levels, most of which were too low to be in there(late 40s), probably some old farming operation who doesn't realize DM ain't worth shit anymore and has no more chest spawns BECAUSE of hunter farms.