I never understood how there was such a thriving prolific underworld on the station replete with unmonitored lawless slums. There's not infinite space and it'd cost 5-10x more to live on a space station than it would on a planet because of the extra cost involved moving water and food and housing restrictions and necessary tax for maintenance. Eventually these criminals and drug addicts would be tearing the ship apart from the inside to sell the pieces for scrap.

Like did no one ever sit down and say "hey, this space station we built for trade and diplomacy to be a showcase for the galaxy is slowly filling up with an impoverished troublesome underclass that's taking up our extremely limited space, for their own good lets clear out these rats and set up more monitoring in less secure parts of the station so all these crazy fucking murders and terrorist attacks stop happening?"

At least in DS9 the lawlessness can be chalked up to the crew having inherited a station which was an old mining processor and they're in the process of refitting it. Like who the fuck approved the B5 plans with very obvious isolated sectors that would have not so much as a security camera put up in them? Why the fuck is everyone okay with little unwatched civilians have access to pathways which lead to every sensitive part of the station?