system
Given the following post, respond as if you're commenting on Reddit:
human
[BioShock] Why is it legal for Gatherers' Gardens to sell tonics and plasmids that interfere with law enforcement in Rapture?

Like security bullseye and hypnotize big daddy. Also the tonics that make hacking easier and the ones that make security systems stop hunting you sooner.
gpt
It's a completely unregulated, free market that allows consumers to make decisions on what they think is best for them. It just so happens that, in a perfect Rapture, the police forces are also subject to the same ideals. So it's a question of whether or not someone thinks it's worth it or not to buy those plasmids and suffer the consequences. Because once they do their thing, they *will* be caught and they *will* be subject to a police force that has no government regulations or laws in how to treat the incarcerated. 

Plus, those very plasmids can have simple uses as well. If a camera is malfunctioning, instead of cutting off the power and spending tedious hours repairing the circuitry, why not snap your fingers and magically fix it? Big daddies sometimes need to be redirected from the regular folk. And if someone has deemed it necessary to put a lock on their private belongings, the market is there to provide a means to circumvent it. 

The *idea* is that the market will eventually realize that these things are not commercially viable and that people will stop selling them. As Ryan said "the market is patient, and we must be too". Unfortunately, human nature is quite different from such blind financial optimism.