I am not a believer in 'the ends justify the means' method of doing things. I have noticed that this seems to be the attitude of most of the left at the moment. As long as they get what they want, they don't much care how they get it.
This is why I gave you the example of the FLDS raid. The Texas CPA used a fraudulent phone call, that they KNEW was fraudulent, as an excuse to raid the compound. The left used a dossier that the not only knew was fraudulent, they were the ones who bought and paid for it.
They are both examples of 'fruit of the poisonous tree,' legally speaking. It doesn't matter whether one likes the target or not; it should be remembered that those who do this sort of thing cannot protest when someone turns it around on them.