Ah yes, recall the era of 'Your password must contain at least 8 characters and one numeric character'. So you can get rid of all the passwords under 8 characters when you run your dictionary attack, and put a 1 on the end of every password that doesn't already contain any (since everyone just adds the digit 1 to their normal password when that happens). Want your users to use a symbol? They will put a dot.

Sigh. Shoutout to all of the people who's passwords end with 1. or .1

Time makes it worse - since all of the sites in that era had roughly the same rules about passwords, people adapted their passwords and just always used a password with dot one on every site. So the goal of protecting passwords from dictionary attacks became completely moot.

I mean, it's not as bad as I make it sounds but still. And as always, relevant XKCD: https://xkcd.com/936/