not surprised, been tweeting recently: a new link to crack, porn, keygens etc... etc... is posted like every 20 seconds sometimes, popping up in the most popular topics...there's almost no moderation and filtering seems like an impossible job on twitter, although I read they pretend to start doing something now...you got to be careful all the time on twitter...those not able for any reason to make the difference between a "legit" tweeter and a spammer/scammer should be careful with the short links used to fit in the 140 characters limit, that often lead to the worse. TweetDeck gives you a preview of what the link actually is if set so in the settings...doesn't always work...not mentioning that the spammers can sometimes post stuff that seem to be on topic, with a dirty link.
Take a look at the screen shot, this is not an example of spam but how you can avoid clicking blindly. Again, this doesn't always work, some spammers are posting links where just the short link appears without unveiling anything until you actually launch the link in your browser.
