"However, there is absolutely no guarantee that innocent Americans haven't been spied on."
Spied on? You mean a database that gathers a list of what phone numbers call other phone numbers? That is just a gathering of data, not spying.
What type of "spying" are you suggesting is taking place on innocent Americans without civil protections?
I specifically mentioned the warrantless wiretapping program, not the phone number gathering program. And that I supported all of the NSA programs.
But read into my post what you will; you're missing the broader point and how above the law, even with a warrant, this all appears to the average American.