@figuerres: natural selection as applied to personal finances. I agree in principle, but in practice it doesn't take much to make a mark out of a generally careful person. I recently risked becoming the owner of a crappy 2.99 game thanks to a couple of overactive young relatives who cannot even understand the UI language of my phone. Yes, it would have been my fault and yes, I would have still loved the two little earthquakes had they made a 499.00 purchase. But I still feel that the industry should make life harder for scammers, not for the general public.
@cbae: yes, it's not a new concept, but that's beyond the point. Apple retains the right to take down an app for unspecified reasons (which is what it did with the original "I am rich"); Microsoft doesn't as far as I know and, as others pointed out, there's no way they would ever risk doing something like that. These apps are just egregious examples, but the same would apply to calculators returning wrong results, programs that corrupt your data, games you cannot possibly play, maps limited to the uptown area of Ittibitty, KA.
User review can only help to a point (spammers, anyone?) and cannot get an app removed in any case. Might be an acceptable situation for stuff that goes for pennies, not so much if you go in the double digits. Totally unacceptable when it involves serious money.
Peer review seems the only way out to me.