And now a public service announcement: don't post photos of your debit or credit cards online. That might sound like an incredibly basic security rule, but it's one dozens of Twitter users are breaking — and now one handle hopes to hold them to account.

@NeedADebitCard pillages the Twittersphere for unsuspecting users who posted completely legible photos of their credit and debit cards on the web. Its sole purpose: to shame those foolish enough to post Twitpics or Instagrams that contain their credit or debit card information.

"Please quit posting pictures of your debit cards, people," reads the account's bio. It has posted 55 pictures and gained more than 2,000 followers since first tweeting on May 25.

While some users are wise enough to blur or cover up some of their card's data, others are exposing it all. One user even included the hashtag #smartidea at the end of her tweet, which showed off her totally transparent cell phone case-credit card holder hybrid.

In a similar vein, WeKnowWhatYoureDoing.com is gathering up public Facebook updates of users saying "hate my boss," discussing drugs, giving out their phone numbers or complaining about being hungover.

Are your friends and folks you follow on Twitter sharing too much? Let us know in the comments.