Would you still be able to be held legally responsible for breaking the law to get the information though? In that case, the evidence would be admissible but wouldn't you be in trouble for breaking into your neighbor's house?
(If it helps: the US's exclusionary rule is significantly stronger and more consistent than those of European countries, particularly the UK.)
Here's a comic about the 4th amendment: http://lawcomic.net/guide/?p=1604
But the reason is: judges aren't abusing the Fourth Amendment; they're the arbiters of it.
http://www.cnn.com/2011/10/06/us/california-robbery-porn-bus...
4th amendment or not, you'd think that the "rules of evidence" and the word of a burglar would lend credence to the explanation that the burglar planted it to make himself seem more respectable in the eyes of the court.
It's outrageous in this case, as reported by CNN, that the burglars were not arrested. It means you can commit any crime as long as you plant some illegal porn!