Go to your Admin Console and type the following:
ban_set wasteofpages
Hit "execute".
Do the same for these:
ban_set harrypooter
ban_set hpspoilerific
ban_set nowah
ban_set jacjoyce
Apparentlythese people are commenting with spoilers on unsuspecting journals, soif you fear being spoiled, banning them from commenting is a goodoption.
Thanks to
ack_attack on 
read_hp for the head's up! 