How in the world did this get 172 points? After this I almost stopped paying attention: "It's my philosophy that it's better to accept a few invalid addresses

How in the world did this get 172 points? After this I almost stopped paying attention: "It's my philosophy that it's better to accept a few invalid addresses than reject any valid ones, so I'm shooting for 0 false-positives and as few false-negatives as possible." But then I looked at the regexps and they miss an absolutely trivial fact: valid email addresses can end in a dot. "jemfinch@supybot.com." is just as valid (more so, in fact) than "jemfinch@supybot.com".