This information can be used to try to attack your computer to hack it. I am sure there are some computer experts here who could give you an understanding of why this is a major security breach. This would especially be troublesome if you were using a designated connection such as a cable connection or DSL.
A person has already tried to sabatoge some threads. The identity has not been revealed but if you notice you will see Vendit is not posting right now and his name was in the html code.