Every forum post displays the date and time of the post. Sometimes it useful to know how long ago the post was made. Also dispayed with every post is the date the poster joined the forum. The join date can be useful too, as well as other info about the poster, which is found by clicking on the poster's name.
Quite frequently I am fooled into thinking that the join date is the post date. While the post date is useful, how useful is it to display the joined date on every post? I find it to be confusing and would suggest it be removed.