3) The Fourth Amendment rights against search and seizure protect people who have broken some law. Innocent people don't care about what evidence found in their houses is presented in court.
Bad (really bad) thinking. The fourth amendment protects EVERYBODY, or at least it would if courts were to uphold it and get rid of things which violate it such as "no knock" raids.
No knock raids came about due to paranoia over drugs on the part of the Nixon admin and the idea was to eliminate the possibility of evidence being flushed down toilets while police were announcing themselves via standard police procedures. The problem: the entire idea of a no-knock raid totally violates the most basic idea of Anglo-Saxon common law which is that a man's home is his castle.
In fact in the mid 70s when no-knock raids first saw the light of day, it quickly became a major form of amusement amongst hoodlums to finger somebody they didn't like as a drug dealer and then watch cops break the victim's door down while drinking beer and eating hot-dogs.
There actually was a case out in Western Md. in which a guy killed several cops and federal agents on such an occasion and a jury took ten minutes to find the guy innocent of all charges and you'd have thought that would have been the end of no-knock raids forever, but they seem to have come back in recent years and it make take some other major lesson of that nature to eliminate the problem altogether.