I'm thinking of skipping out on the bill at the restaurant.
Why wouldn't you pay your bill?
Why should I? I didn't like the food or the service.
It's understandable to be upset if the food and service at a restaurant was bad but you shouldn't just walk out. It'll look like you're trying to dine and dash. At least let the staff know you aren't satisfied and they will likely let you have the meal for free and apologize.
Wow, you sound like a boring saint. I will learn my lesson some other time.
Even if you didn't like the food, you still have to pay for it. That is the rule.