Twitter once again

Okay, so if we are talking about twitter content what comes to mind. I am noticing more and more that twitter is gaining popularity. It seems that only yesterday everyone had a myspace ancient right yeah I know lol. People put some wild things on twitter along with crazy pictures of graphic images. Hey I am not complaining but my question is who is able to view these images? Only followers or is this content available to everyone. I can't help but think how an employer might react to someone's twitter content. I was at the wellness playing basketball the other day and everybody was tweeting. Someone would make a joke and upload the joke to twitter. After that point everybody errupted in laughter. I think twitter is a great way for instant responses and immediate correspondence. I need to get my twitter game up as well people.