They would almost certainly escape into the wild and breed with native or natural species, creating problems like how asian beetles are replacing ladybugs, and earwigs spread like an invasive species, not to mention African honeybees displacing other species of bees.
*hat tip Ace of Spades blog
It takes way less resources to produce the same amount of cricket protein as beef protein.
Meat production is extremely wasteful.
If you are trying to figure it out I suggest you do some badic research in that.