Just a note to warn twitter users that there are some sleazebag law firms monitoring tweets to look for any libel on behalf of political candidates, celebrities, or just ordinary people. They act as mercenaries, soldiers for hire, looking to start a war in order to find employment.
They first "follow" every tweet to find anything that could be exaggerated or mistaken about anyone, then contact them to offer to sue on their behalf. Not that it's happened to me, it hasn't, but it is happening to others on twitter.
The only defense is to block them immediately. You can block any follower of yours by going to their twitter page, pick any tweet and click on the upper right corner of the tweet, and select "block".
Otherwise, lawyers begin to compile a dossier of tweets for purposes of showing malice, to overcome the NY Times vs. Sullivan barrier in a libel suit. It's a good idea to check out your followers as they arrive before that happens.