(If you already made a PE, ignore this part)
On another note, i would refrain from making forum posts about griefers and such, it would be much more efficient for you and the staff to open a pe for it. Just stand near the grief, and do /pe new (Describe the issue). This'll make it tons easier for the staff, as they can actually trace blocks to see who commit the grief. Its kinda pointless making a forum post without any proof .