Gatecrashing youths took over a waterfront inflatable park by jumping on the equipment after apparently not paying to use the equipment.
A video shows them climbing all over the pay-only aqua park and larking about pushing each other over, as people watched from the sidelines.
Wild Shore on Dukes Dock, adjacent to the Albert Dock in Liverpool city centre, is a marketed as a family-friendly attraction made up of huge inflatable slides, trampolines, rafts and barriers.
It can only be used by pre-booking at a cost of £18 per person, but on two separate occasions, gangs of yobs have ignored the rules and jumped into the water to gain access to the floating structure, the Liverpool Echo reports.
It is now believed the aqua park has been plagued repeatedly by gangs of youths, either causing a nuisance from the bank or entering into the water themselves to gain access to the inflatables which make up the attraction.
An eyewitness said: “It’s been a regular occurrence for over a month now.
“Paying customers have come from miles around to use it, but almost every night they have had gangs of kids throwing stuff at them from the banks and generally causing a nuisance.
“They have also been terrorising staff. It is embarrassing for Liverpool that these scum have been allowed to be such a nuisance, and such a threat to people who visit and work at the site.”
Unconfirmed reports said the attraction would be closing earlier in the day for a trial period to see if it makes it safer for paying customers.
Despite this, the hot weather has continued to make the temporary structure a target for non-paying gatecrashers.
The operators of Wild Shore have been reached out to for comment.
Police revealed they had now extended a dispersal zone at the waterfront until 1am on Thursday, July 22, following numerous incidents of anti-social behaviour both at Wild Shore and elsewhere.
Liverpool Community Policing inspector Charlotte Irlam said: “Our beautiful waterfront should be a space for everyone across Merseyside to enjoy the lovely weather we’ve been having, not a place for the reckless anti-social behaviour we have unfortunately seen recently.
“That’s why we have introduced a further dispersal zone today to prevent similar incidents from recurring and so that families and residents can enjoy our waterfront without their day out being marred by anti-social behaviour.
“We understand the impact of anti-social behaviour on the community and the vast majority of law-abiding visitors to the area, so I want to warn anyone planning on gathering in large numbers or causing any trouble that we will send you away.
“The dispersal zone gives us the powers we need to deal effectively with people and I would urge anyone in the area with any information about anti-social behaviour or other concerns on the waterfront or city centre to contact us.
“Furthermore, if you are the parents or guardians of young people, please ensure you know where they are and discourage them from being involved in such behaviour.”