I did not let them in. But they came back the next morning with 6 cruisers and about a dozen cops who surrounded my house and stayed there for about half the day. The police couldn't tell me what phone number this alleged phone call was made from, nor would the bail agents discuss it with me.
I doubt most jurisdictions really make it difficult on cops to get search warrants, no matter how bogus their info is.
i) They are generally very nice people who ensure that some modicum of law exists in society, and many a time they are heroes in every sense of the word.
ii) However, at the same time I am cognizant of the fact that they are human, and that just because someone wears a blue-suit, carries a badge, and open-carries a fire-arm, does not mean that they are as white as hysop. A cop can be just as dirty as any perp on the street, with the only difference being that the perp on the street has to watch out when they break into your house. A cop can simply go in through the front door, while the perp would probably try and jig a window in the back.
Thus, most cops are good people. However, there is nothing intrinsically present in a cop's badge that makes the holder of one immaculate. No oath can do that. In my profession (fund management) one of the highest milestones is the CFA designation, and one of the key cornerstones of it is ethics (one can get kicked out for the smallest infringement). However, that doesn't mean that there are people who are not ethical. Sadly, there will always be humans who do bad things.
And until the day that people who become policeofficers come fluttering down from heaven on angels' wings, there will always be some cops who will be worse than perps.
It takes a case like the one in the article to ferret out sloppy or unethical activity by some officers. And believe it or not, judges do not like to have their signatures on falsified warrants. The next time an officer from the agency requests one the judge will be a lot more attentive.