My local park has an armed security force, and their main job is to patrol the park and eject troublemakers. Like if you line jump, shoplift from a shop, break any park rule, enter restricted areas, or do anything that could affect other guests or make them feel uncomfortable (such as hitting on teenage girls) those actions can get you booted out of the park real quick or even arrested by regular police on the outside. Usually what happens is when a person does something bad, a park employee will radio or call security and security officers will show up and apprehend the person and escort them to the security office. Then, the paperwork will be filed, and the person will be either escorted to the park exit, or held for police to arrest the person and transport to jail depending on the severity of the offense. Also, if you try to enter the park without paying or rub someone's handstamp on you to gain entry, you can be arrested. Parks can also ban a person from returning to the park for a period of time, such as the rest of the season. If a person attempts to return during the ban period, they will be arrested for trespassing. Stores such as Walmart do that to shoplifters, too, ban them from the store for a period of time or life.