Can I  take advantage of a free meal?
Why do you want a free meal?
I love a free meal. All this thought about leaving a restaurant without paying makes me hungry.
Well, if it is free and offered to you, that is fine. Better than letting it go to waste.
I will take advantage of it and leave a bad tip.
You cannot eat somewhere if you don't expect to pay. Dining and dashing is illegal and you could get in trouble with the law.