Just wondering...

As monthly line rental fees push young people and professionals into mobile-only arrangements, I wonder if the subsequent decline in landline usage may have an unexpected benefit - far fewer spam calls. Or is it just an untapped market for the offshore and local telepest farms? Are mobiles safe? Not being listed in phonebooks helps, of course. But if people's phone rages are mollified somewhat by the distribution of calls across households, I can't imagine the anger generated by spam calls to mobiles. Mobiles are more personal. More selective. They wouldn't dare intrude. Would they? Could they?