A group of kids- I say kids, they were blokes around 15-17 years of age, wearing the same gear as these guys boarded a P4 at Stondon Park at October half term ,very aggressively and made it clear to the driver that they had no intention of paying. They then started to ' bait' other passengers by making personal comments in loud voices. Fortunately I got off the bus a few stops afterwards but the rest of the passengers plus the driver were clearly scared of them. The driver made no attempt to challenge them or secure payment.