Seeing people's tweets, is that the medium is used a lot Email Database by self-serving, ego-centric people. However, I do understand why they do it. There is currently vast unemployment, if you think the US and UK's unemployment rates are bad, take a look at the Email Database third world countries and you will see millions unemployed or employed at ridiculously low rates of pay.
In order to survive, to get food and shelter they are clutching Email Database at straws to promote their business in a medium of 140 characters. Some bombard Twitter with tweets every few minutes, others use Twitter for nefarious reasons and hack Twitter to get your Email Database email address so that they can obtain income through spamming or spruiking non-existent goods or services. However I do not want my Tweet feed to be clogged up by these 'Twerps'.
So I delete or report for spam if the account looks Email Database suspicious. One good way to evaluate if your Twitter account has been abused is to use a different email address that you only use for your Twitter account. That way you will know first hand that spamming is going on as suddenly that your email address attracts useless spam. Review your followers I review Email Database every single person who follows me to see if they tweet. A common sign that all is not well, is when you visit their Twitter profile, there are no tweets, yet mysteriously they have built up a following of their own.