Shaming sites with dumb password rules.
Feel free to submit a pull request with dumb rules you've encountered.
You "may use special characters", but only some of them - and we won't necessarily tell you which ones.
Financial services - where we don't allow you to create the strongest password possible.
We put punctuation in the list of unusable characters to make it additionally confusing.
Your password needs to be between 8 and 10 characters long, with no spaces, and must contain only numbers and letters. The first character must be a letter.