I think lithium batteries are so commonplace it would be hard to ban them completely. digital cameras, iPads, iphones etc... all have them. When we see a batch of litium batteries on the NOTOC it is often a shipment of mobile phones or iPads, not just boxes full of batteries.
That said, there should be more restrictions on what we can carry as well as how they are packaged. Maybe manufacturers can make some way of making them inert on demand?