I highly doubt their day to day lives differ that much from mine or yours. They'll still have a family, a job, go on holiday ect... They just have more passion for their club, which still takes up the same amount of time as supporting Brighton, just a bit more effort. I don't really think...
They like to throw shit. I suspect if nobody did anything back that would have encouraged them just as much, maybe more. They're the type that see a lack of hostility as an opportunity.
They were also holding their phones against the plastic barrier with all sorts of different images on. Palace badges and the Queen were the most common. Not sure why they bothered tbh