Im sure you could feed them without any immediate harm, the question is wether or not they have good enough nutrients to keep your gecko healthy over time. That I do not know the answer to. really though to not feed your gecko crickets just because you dont like dealing with them is irresponsible. In my opinion just feeding a gecko just mealworms isnt good anyways. a good varied diet is best. If you hate crickets just feed them with tongs (to aviod loose once in the cage making noise all night.) and keep them in a closet or room where you where dont have to hear them. I would say most people dont like crickets, I dont. Its just a part of the hobby you have to deal with to make sure you take proper care of your animals.