We held a 16th birthday party for our daughter at our home. We thought we had everything covered: entry lists, registered the party with police, security at the front of the house, neighbours helping by keeping an eye on things.
What we didn't consider was that gate crashers would cut through our back neighbours yard, jump the fence and crash our party. They caused a lot of trouble and ruined what should have been a happy night. We have no idea who they were or where they came from but were very glad to see them leave.