Drunk people, homeless shelters. It's a choatic area in Amsterdam, will attract lots of things and certain people don't care about CCTV, hoodie is enough to cover up. Police is always understaffed in nights of a weekend so they just don't really look forward to a new hotspot they need to go and check up on. Just happened last week that a friend jumped in between a 16 year old boy being beaten up, the police eventually came but left quickly and didn't want to call an ambulance because of lack of resources, he had to go to the ER himself. Turns out it was so bad he needed surgery the next day.