Well you are free to do whatever with your cf's they can be broken by ticking the box and clicking break cf's after all no matter how many terms you included that restricts you from doing so.
The thing is if you get a reputation for playing dirty or backstabbing using tecnicalities no one will trust you, and you will find dealing with them to be a much harder task in the future.
I would agree with Elit and StratO on this one, treat people nicely and you can expect them to treat you with respect as well, treat them badly and you'll get backstabbed at the most convenient oppotunity and you would only have yourself to thank for that one, no matter who was technically in the right or technically in the wrong according to terms.