Personally I think that a lot of athletes could use a ghost tweeter, at least until they learned how to tweet. Most athletes I don't think understand the true purpose of Twitter (to be honest I catch myself wondering if I truly understand myself). Fans are following them to feel closer to them, to get a little more of glance into the person that these players are when they are not on the field or court.
One athlete that I get some what annoyed with both on and off the field is Chad Ochocinco. The fact that he changed his name to his jersey number to me just stamps "not a team player" on his forehead, but any ways.... I have checked out his Twitter page a few times and there are times when I think that he is using it perfectly. Just today he tweeted : "Standing in line waiting to get tickets to watch
However upon venturing down his feed a little more I come across just the type of things that we do not need to be seeing on his page such as what appears to be fights or arguments between him and his (ex)girlfriend. Talking about personal details and even using somewhat graphic language that should probably be used in private, not on the internet for the whole public world to see.
Any athlete or celebrity who tweets their own tweets should be monitored by at least a publicists so that they do not my make stupid or regrettable choices in words posted, to remain on the internet for the rest of their career.