They did several years ago but all it did was cause more grief for everyone. It backed up lines and caused all sorts of arguments.They put plexiglass slots in front of the opening to the scanner. It just ended up cracked from people jamming their bags through. Not to mention, their are different size requirements for different AC. I do have to say adding a double check fee at the gate would help. The European carriers do it and it seems to work.
All you have to do is walk over one terminal to USAir's mess and see the night and day between theirs and Delta's. Delta's gates are still jam packed but at least you can sit up at the restaurant/bar and have a glass of wine and such and play with the complementary iPads while you wait right across from your gate. That makes it worth it. That said, Delta was a hot mess during the construction.
