Yes, it is generally considered disrespectful to leave caked-on food on dishes when it's someone else's chore to wash them by hand. When you leave dishes with food residue, it makes the task more difficult and time-consuming for the person responsible for washing them. It can also be unhygienic and may lead to unpleasant odors or attract pests.
Being considerate of others and their workload is essential in shared living spaces or when someone else is taking on the responsibility of washing dishes. If you have caked-on food on your dishes, take a moment to scrape off the excess food into the trash or compost bin before leaving the dishes to be washed. This small gesture can go a long way in showing respect and consideration for the person doing the washing.
Additionally, if you notice that the dishes are challenging to clean due to caked-on food, you might consider pre-soaking them or using a gentle scrubbing brush to remove the residue before leaving them to be washed. Remember, maintaining a harmonious and respectful living environment involves everyone contributing to the household tasks with thoughtfulness and consideration for others.