It only annoys me because I can't stay logged into my YouTube account without being simultaneously logged into my gmail account. Although it only takes 3 seconds to log in and out, so it's not a big deal.
I'm with Duff on this one. As much as I'd like someone dead (your example was perfect Skeptic), I wouldn't want to physically see it happen right in front of me. I'd just want to know that they're gone.