Your comment is very presumptuous about both my point and my views. I don't care about NSL's or FISA warrants. I don't care about going after terrorists or enemy combatants. I care about Americans in America who the government is abusing. I care about real people, whom I have personally spoken with, who have and are facing these issues, not people in some thought experiment. Some of them are non-Abrahamic religious minorities that the government seems obsessed with, mostly due to a lack of understanding of their religion. People and causes you have never heard about...
I care about warrants issued by in district courts that function as rubber stamps. I read search warrants every day and more then you may suspect are very weak. They have a very diluted view on what probable cause is. These warrants are generally sealed and in many cases the subject of them is never notified that they were the subject of a search. I am not just talking about electronic records; mail, cars, homes are all searched in this way. I think you would be shocked at the number of packages that both state and federal search warrants are obtained for and are not found to contain anything illegal. In these cases the package is repacked and delivered to the recipient without notification. These searches as documented in my local courts are no more accurate than a coin toss. But if you are on the wrong side of the coin toss, good luck, your life just got incredibly difficult.
If someone wants to make you a target than all an agent of the government needs is to claim to have been identified by an informant, that claim alone passes as probable cause in this world. The "informant" is never made available to the judge for questioning, they just take the agents word for it. The records of this search could stay sealed for years but don't expect a notification when its unsealed if you are an unknowing subject of one. As for subpoenas, they are rubber stamped, they are not subject to judicial review. The government just issues them to themselves. The court only gets involved if you say no.
As for something that impacts me, if a warrant is actually supported by probable cause, and the judge makes an inquiry into the facts of the matter, then I am cool with it being issued. What more often happens is the judge reads the application and signs it. When you fail to be skeptical, then you become a rubber stamp. I believe that it should be very hard for the government to invade your privacy or convict you of a crime. Our society has given the government far too much latitude in these matters and it needs to be rolled back.