Becareful what you tweet about because it might come back to haunt you

Hmmmmmmmmmmm this lady tweeted that she was going to africa and hope she does not get AIDS but later added that she was joking and she is white, she got fired before she got to Africa and had to board the next available flight back to her country. Why would anyone tweet such?
Another incident was that of a male fan of a popular radio station who was always tweeting and insulting that radio station and then had an interview of a job he really needed (not with the radio station) but unluckily for him, a staff of that radio station is a friend to the owner of the company and so called his friend to come help with the interview (don't forget this friend works in that radio station and has access to tweets and facebook message), this friend saw the name and because of the tweets did not short list this guy for the job. Read her tweet after the cut...

We need to becareful what we tweet about because you might feel you will not need that person for anything but don't forget that karma is a Bitch.