it would be great if you could get a sensor flush toilet like in the public loos. then puss wouldn't need to flush! an i think it would save the worry of lots of parents with toddlers that love to go exploring things like litter boxes!!!! i don't think i believe that it's harmful or cruel for cats though, cats aren't really the type of animal that would be forced to do anything. they tend to do as they like. if they didn't want to be toilet trained then they wouldn't be. also i think i would be interested in teaching my cats this if i had a multi toilet house. but at the moment there is only one toilet and i would worry when i'm in the shower or when i or my partner were using the loo the kitties would have no where to go.