Twitter is popular among people that frequently are online. You would guess that with a profile like that they know the ins and outs of surfing the web. At least they would know some basic rules about safety on the web. Not quite.
ZDNET noticed it and Mashable reported:

“Something called “twitterrank” has been #1 on Twitter’s trending topics for much of the afternoon, and a flurry of tweets have been coming across along the lines of “my twitterank is 30.35!” with a link to an individual page for each user on a crudely designed website. While the site doesn’t give any real details as to what the number means, users have been handing over their credentials in mass to get the latest peek at what their Twitter popularity might be. Bad Idea.”

Of course it’s a bad idea. You don’t give your credentials on any other site than the one you use them for. This is just plain phishing. It’s scary that people who are used to working on the internet were so easily convinced to hand over confidential information.

It gets even better @Flashman published a piece of the Twitterrank sourcecode

‘I am about to ask for your Twitter user ID and password. You should be afraid. This is where you ask yourself,”Do I really want to find out my twitterrank badly enough to give some random dude on the interweb my account info?” And if You don’t ask yourself, shame on you.’

At one moment there where 1663 mentions every 100K tweets according to Twist. Whoever did it gave us a mirror and something to think about. I expect Twitter to do so as well.