Yeah...
Though I wonder... If you have a blog, how come you don't delete information on it as soon as you think about auditioning? OK perhaps it's difficult to remember, but certainly if you're into idols, you should be aware that many idols gets problems due to exactly these things - that of social media coming back to haunt them. Even if you cannot recall to do this, wouldn't there be some sort of advisor when you audition, that says "Oh and girls, if you got blogs and stuff, be sure to go through them and delete things that might hurt your popularity and chances if you were to make it through"?
It's not a great start to have these things appear, it kills interest in a lot of people.