Users are now required to change their passwords every 90 days, with a password history of one year (i.e. you cannot use a password from the past year). This is for your own protection; good account security involves regularly changing your password. If you receive a notice that your password has expired, please change it to something new.
Any further posts that appear to be flaunting how they have shit password security and how they're awesome for not getting hacked even with such idiotic practices will get their accounts suspended because there's a high probability that your accounts will end up getting hacked and generate extra work for us anyways.
Seriously, it's not a positive thing to be retarded at keeping your account safe.