unavoidable? It would be very easy for padmapper to be successful and not destroy CL. If padmapper continues to pull search engine cached listings from sources that don't increase CL bandwidth, then displays them in a really nice UI and also links them directly to the CL listing page... that is successful. And CL is no worse off. CL is being a jerk about this. This Chrome extension is just going to increase CL bandwidth and probably get people IP banned... and very likely further piss off an already irrational entity.
If Padmapper succeeds in becoming the primary target for traffic, and Padmapper has the ability to post listings (which it already does!), then Padmapper will innately be supplanting Craigslist.
It's unavoidable because the incentives are extremely strong, and doing so would be a natural, easy progression. That's just how humans work.
well... technically it is PadLister that has the ability to post listings. Yes... same guy but different site. I would imagine that PadMapper runs PadLister listings along side CL listings. Which is a smart move for any aggregate service like PadMapper. PadLister is really the CL competition.