Surprised to see this pointless thread has not been locked by a mod yet.
There isn't really a reason to, just because a thread is "useless" doesn't automatically mean that a mod should lock it... If you lock it and someone has a question then they have to make a new thread, creating further clutter when someone could have just bumped this thread, gotten their answer and gone on their way....
EDIT: also consider the load on the mods... If you have a large forum (like this one) and every time a thread becomes "useless" they have to lock it then it would become a frantic dash to lock all of the threads, then lock the threads when someone has a question about whatever thread was locked, if you really look at it it's unrealistic to lock all of the threads