while i would NEVER advise it and would get the off the roof RIGHT AWAY! kids in not so nice city neighborhoods that don't have public park spaces play on the roof. it's so dangerous, but generally a good skate park or playground solves the problem.
urban building=urban issues
architecture and development affect people's behaviors. it's really fascinating. here, they built urban density without understanding the necessity of urban infrastructure. people are like little animals and it's easy to build in ways that will ensure certain kinds of behavior. some types of development that are high density without infrastructure like the "projects" for example, actually encourage isolation and crime.
meanwhile, if you took the same project building, created a large lobby where community can gather indoors ensuring communication, good lighting and openness in public areas like hallways, public indoor play spaces and community areas, recreation like pool and surrounded it with parks and trees, it would be a very safe and secure billion dollar condo.
the cost of something doesn't necessarily ensure how people behave, the design does.
i don't think developers here put much thought into that. too bad, a little thought can reap alot of $$$!
p.s. where there's a lack of community, there's a sense of lawlessness. and even in an urban environment, you CAN create a sense of community. i think people feel as though they can get away with anything - leaving young teens alone to party- because, well, they can.
it's a tragedy to lose young people like that.