It's not just security, but also operations & entertainment. Ops TMs are stationed in haunted houses as safety/security liaisons. Should they see anything unsafe/a scareactor gets hit (or a scareactor tells said TM to follow them), the TM follows the Culprit out of the house and right into the hands of security/OPD. TMs at the exits of houses are also utilized for the same purpose--flag down security/OPD as needed. Ops acting as Queue Patrols can do the same--flag security & have someone escorted out of line/the park (if needed)
Entertainment has supervisors/coordinators who monitor houses/scarezones, so they also can flag security/OPD as needed.
Safety is serious business. Even moreso at HHN.