Antibiotic residues in Pork?

USDA announced tighter limits or more inspections of pork looking for "antibiotic residues" that might be harmful if eaten.
No mention of breeding up an antibiotic resistant version of the andromeda strain by feeding penicillin and other antibiotics to farm animals. A common practice but very dangerous. The damn bugs learn how to survive antibiotics. A lot of antibiotics that worked just fine when I was a child are no longer effective, the bugs have learned to resist them.
Bad enough that we over prescribe antibiotics for humans. Worse is feeding them to farm animals by the pound. Sooner or later an antibiotic resistant bug will jump from animals to humans (swine flu anyone). The farmers claim that the antibiotics make the animals grow faster and bigger and squawk whenever someone suggests limiting antibiotic use.
Anyhow, I don't see a problem with "antibiotic residues" in pork, that could not be solved by banning the use of antibiotics as feed.