Ahh I'd forgotten those aspects of yuppies. I guess the difference for hipsters then would be to show off their eco-friendliness and alternativeness.
I guess it could be fun if you were confident in your cooking and if there was quality control in people's products. Without FDA approval though, you don't know what you're getting. People could be growing their veggies in fecal matter or adding plant steroids, and you wouldn't know.