In yet another sign of the risks of social media marketing, Citibank’s Twitter campaign for its new Citi Simplicity Card has been hijacked with negative tweets.

The hashtag #CitiSimplicity, designed to showcase social media comments on the new Citi credit card, is generating some negative comments about the bank. For example, Citi posted a tweet about how “#CitiSimplicity is putting every cent towards wedding of ur [sic] dreams, not a late fee. Learn about no late fees, ever.” And that generated the following reply comment:

@Citibank Up yours, debt plantation masters. #strikedebt

Ouch.

A request for comment from Citibank — via Twitter — went unanswered.