this is a really yes and no answer, it would depend on what you have in your house, what the crickets could have been exposed to chemical wise, and what they could have eaten around your house.
if you have anything that is toxic, or toxic plants in the house i'd not feed them to your chameleon because the crickets could have come into contact with these things, or eaten them and will poison your chameleon, not worth it for a few crickets.
i have fed escapee crickets that i have found in the house, and my chameleon has been fine