Last summer my folks were complaining about a maggot problem in their outdoor trash container. I took a look and yep, there were dozens upon dozens of maggots wiggling about, in the bottom of the container, feeding off the liquid that leaked from trash bags. Add in the summer heat, plus the humidity and rain, and it smelled to high heaven.
I live in an apartment so I can't really do any fly culturing. Though it's interesting to hear there are less smelly alternatives that work. But then again I won't have time...going to work, coming home late...so tired that I barely have energy to make dinner. Then I muster up whatever energy I have left to take care of my mantises If I had lots of time, and a nice big yard (yeah, right, like that's going to ever happen), I wouldn't mind giving a shot at culturing flies. Especially curly winged ones.