I'm like 60% tongue in cheek, because the reality is, for every interviewer who will filter you for being too aggressive, two more will filter you for lack of confidence.
I think you're interviewing with the wrong people, or at the wrong places. Way too many people treat interviewing as a way of demonstrating intelligence via computer science trivial pursuit. 5 minutes with Google will demolish 99% of the questions you might ask if all you care about is getting correct code on the board. The interesting part is the process and discussion the code creates, not whether or not they know the secret handshake.
That said, there are places that don't interview the way you describe. I'm equally sure there are places that do (I vividly remember my Dropbox interview). My hope has always been that Darwin's Law will apply to such places over the long run, but instead I think what actually happens is that as these organizations grow the interview process just ends up being a diluted version of the same BS, which translates into "lowering the bar." Nevermind that your bar was curvier than Lombard Street.
They did and that's the problem ;)