I don't know what ever made you think you had "privacy" in this or any country. Seriously, what privacy are you talking about?
Our government created and/or modified intelligence gathering infrastructure with little opposition after 9/11. They knew there would be little after the attacks and for all the good that happened after the attacks (in terms of us rallying around the flag, all beign Americans, etc.) that same sentiment, along with fear mongering has trumped legal priviledges this country granted its citizens since the birth of the country.
We all know the Bill of Rights was developed to protect
us from the government.
Obviously the largest attack on privacy is also on 4th Amendment. Did we know the govt. spied on its citizens? Some of us probably had a clue, but it was the govt. that came out and said, "hey folks, our bad. We've been spying on you guys without any sort of warrant for years now." It took Snowden to bring it to light that our government was and is spying on us without probable cause, without warrants, and without suspicion.
The DOJ interpretes the 4th Amendment as to allow them to access the records of millions of Americans using only subpoenas. No warrants. As you know, warrants require some sort of probable cause. A subpoena is just the govt. saying "we want that". The DOJ uses this to gather info from Facebook, Yahoo, Microsoft, or Google, then tells those companies they aren't allowed to tell you if, nor how much, info on you the govt. gathered on you. The DOJ even issued a subpoena for things like the Project On Government Oversight's documented abuses at VA facilities.
Our borders used to be on the actual borders. Not until DHS came along and said "nah, the 'border' is actually a 100 mile-wide swath covering 2/3s of the population. They'v eused that interpretation to set up warrantless border patrol checkpoints not on the border.
Government no-fly lists are non-public, and is simply the govt. selecting who is allowed to travel by air. No way for you to know. No way to get off the list. Nothing.
The govt. changed HIPPA rules in 2002 to allow those records to be disclosed for national security purposes.
I often see comments on here about Orwell, Soviet Union, and other totalitarian regimes but we ignore the resemblence of those regimes in the case of the war on terror because it makes us feel better? I just don't agree with that approach.