Hackers are the rarest type of troll. They are often very dangerous. Hackers can often destroy unprotected forums within minutes, and some (Such as Aequitas the Eliberator) can hack even high-security forums. This type of troll requires insant Moderator and Administrator awareness. Sometimes Hackers form entire groups (Such as the Eliberators) to better increase there chance of hacking a forum. Some trolls are capable of hacking like Rexby, Aequitas the Eliberator, and Spammintroll679.
Hackers are the most dangerous type of troll and usually pose an immediate threat to any forum.