Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-108.218.169.89-20140128052529/@comment-24.72.101.227-20140131223657

Stiles wrote the message on the board to kill Kira. That is why he went to the lab in episode 16 and wrote the message out again, to compare his writing with the orginal message.

And the they are all marked with the # 5 and there are 5 of the black things...