It's interesting, anecdotal, but doesn't really prove anything. My personal opinion about both of your encounters is that since you didn't know the true identity of the person at the time or any evidence linking you with him specifically, it doesn't prove anything.
I haven't seen anything I'd consider solid evidence yet and, at this point, don't know if I would believe it. It would be good if we could move on from this issue and get back to the business of trying to salvage as much of our country as we can.