Sometimes there is a perceived need to perfectly fix a problem, and that need can be the enemy of incremental steps that can reduce a problem to an acceptable level. Let me illustrate this by making one of those physical-to-virtual analogies that never really seem to translate very well:
Saving the whales is a difficult task that we will probably never completely finish. We won’t turn the entire planet into a playground for whales, nor do we need to. But if we take steps to regulate the hunting of whales and to protect their food and environment, that may be all that is both possible and needed.
Similarly, we won’t ever completely stop online crime. Consider how that impacts the current view of IPS and signature-based detection methods. These methods often develop a bad reputation because they can be poorly implemented and evaded, and they don’t always detect or prevent all criminal activities.