Agreed. It's one of those things that is probably fine to do in moderation, when people know what they're doing. I personally wouldn't do it with my frog as he has a history of impaction (he was impacted on substrate when I got him from the petstore and barely made it) and because of that I'm paranoid about what I give him. It's possible to give the frogs a varied diet without risking wc prey or using prey with a risk of impaction, but it's probably just as possible to feed them things like june beetles and end up with a perfectly healthy frog.