Spamming Twitter is a no-no.
Even though Twitter has only a few days search capacity for previous Tweets (due to the monster amount of tweets that are written every minute, let alone day), there is no need at all to keep posting the same Tweet over and over again. Nor to pick on a trending topic and put those hashtags in if they are not relevant, as Habitat discovered!
Today, some plank who claims to be an SEO pro has spent the entire day spamming certain channels on Twitter. I cannot begin to imagine what that has done to any business opportunities he may have been seeking to gain, but I do know that several people have tracked down the culprit and as he is US-based are now taking matters into their own hands to get his ISP to disconnect him.
Repeatedly tweeting the same message is bound to get people’s backs up. Why do it? Unless you change the text every time, the only people who will see it are your followers (watch them unfollow, fast) and those scanning for/monitoring certain keywords – as I was.
Before you develop a social media strategy, and adopt tools where required to do so, make sure you test them and don’t do anything like automate repeat tweets that will undoubtedly gain you far more enemies than friends.