I was working at a medium sized accounting software firm over a decade ago when I was called into the CEOs office and sat down for an interrogation. Apparently

I was working at a medium sized accounting software firm over a decade ago when I was called into the CEOs office and sat down for an interrogation. Apparently they had setup their Exchange server poorly and I'd had access to any number of mailboxes (including the CEOs) and other folders that I wasn't supposed to have access to. I was completely unaware of this access, but was being directly accused of having access confidential information. I insisted, truly, that I wasn't aware of the access and hadn't looked at anything confidential, but they tried to tell me they had proof that I had accessed email I shouldn't have. At this I got upset and demanded they show me this proof, which they couldn't do because they didn't have any, but I'm guessing they thought I had seen some stuff and they could get me to cave it if they pretended they had proof. Anyways, I didn't get in any real trouble because I wasn't intimidated, but it damaged the relationship and I ended up quitting a few months later. Now I feel the same way as OP, I don't want to be in a position where someone can make a plausible accusation of misconduct, you could be totally honest and still end up railroaded just for being in the wrong place at the wrong time. CYA.