It's rude to cause service workers to do extra work.
Tim is at a restaurant eating a meal and making a big mess.
Tim wants to finish and leave.
Tim cleans up the mess he made the best he can and piles it on a plate for easy removal.
Tim pays the check and leaves a huge mess all over the table and floor.
The busboy has an easy time cleaning up, and the table can be returned to service quickly.
The busboy and server have to spend 20 minutes cleaning the area, and service backs up.