> we never trusted the FSB with anything sensitive in the first place, so they had no opportunity to commit the crimes that the NSA has perpetrated.
Don't mistake absence of evidence as evidence of absence. And I say that knowing full well that without a FOIA, such a mistake is impossible to avoid. The fact is you have no clue about any agencies besides the NSA/CIA/FBI. Be careful how reliant your hatred is upon knowledge when your knowledge is deficient.
> the NSA are the ones that the Americans are actually paying for and who we have some (albeit low) chance of stopping
The NSA/CIA/FBI are the ones that anyone has any chance of stopping. Because its the only one where FOIA information can overcome your ignorance that "they had no opportunity" or some such nonsense. But the first step is to enact FOIAs, not stopping the NSA/CIA/FBI.