I've missed them even with this on, simply because I also wade through/ignore a lot of other notification emails from Facebook (birthdays, events) or just don't

I've missed them even with this on, simply because I also wade through/ignore a lot of other notification emails from Facebook (birthdays, events) or just don't check my email during travel/vacation. I've also seen the email, gone to the site and thought the person deleted it before I found it. I'm fine blaming some of this on user error, but I still think it's bad design.