If they can only obtain the information after getting a proper warrant, then I see no problem with this. I believe the problem is that the various governments, within the United States, have all forgotten that they must obey the U.S. Constitution, as well as the various Federal and State laws. The "stick notes" issue is a glaring problem, but it is one that has problem been occurring for some time.
While there is no guarantee of privacy in the U.S. Constitution, the third, fourth, fifth, and ninth amendment do cover the grounds that would give people protection from unreasonable searches and seizures. The problem is, all too often, politicians and enforcement agents of the government tend to believe that if right or protection is not written in black and white, then it does not exist. Those people seem to never pay attention to the ninth amendment.
I believe it is time for the people to stand up and demand better protection from unreasonable government intrusion. The people of the United States are not the enemy.