Leaving food in at all times?

The breeder I got my leos from said that he leaves a few mealworms in the tubs all the time and feeds crickets a few days a week. Is there anything wrong with this? He says that they just eat when they are hungry and grow pretty fast and there arent any problems. I just wanted to see what everybody else thought.

To me it seems fine because I wouldnt think that a leo would over eat just because there is food there, and they dont move much like crickets so they wont cause stress...

You can leave mealies in the tank all the time, just make sure they are in a bowl that they can't get out of and the Leo can get in to. I find glass ashtrays work well, around $1 at Walmart.
Change the mealies out though, you want to make sure they are nice and gutloaded. Just take the old ones out and pop new in after a day or so.

I feed Superworms and leave them in 24/7. And I feed them roaches 1 or 2 times a week. The worms are in a container with Vitamins.

You can leave mealies in 24/7 without a problem. Since calcium really doesn't stick to meal worms I will put some calcium in the bottom of the bowl, so when my leo grabs a meal worm, they also get some calcium as well. The leo will also be able to lick up calcium when they feel they need it as well. I do put a small piece of carrot in the bowl as well so the meal worms have something to feed on. It helps keep them a little more active and moving around...not to mention keeping them a bit more gut loaded for a longer period of time.

I do the exact same thing. I use one of the worm dishes from petco. I keep some calcium in the bottom, and a small piece of carrot. I feed crickets a few times a week, and I'm wanting to start raising dubia's soon.