You don't have to sign a ToS for it to be active. Using the service means that you agree with the ToS. Damn, how can someone be so ignorant as you?
You spammed with a bot to get BTC and now TF wants it back. Sounds legit and logical to me.
My 2 cents.
So your world works like this: a faucet gives you money for watching an ad. You take the money. A few months later the faucet owner finds you on bitcointalk and says: "hey I just found out that you weren't even watching the ad, you were making sandwhiches in the kitchen when the ad was playing. This is fraud and you owe me three times the amount of money that you got from my faucet." The faucet owner lowers your bitcointalk trust and calls you a spammer. This is fair and right?