When you log in for the first time, it says "Be sure to read the FAQ." The FAQ conveniently located at the top right of your screen before you even make a character. The FAQ clearly states the rules, such as controversial discussions, flaming, and whatnot. You violated said rules after being guided to the spot they were listed. You don't get to claim ignorance when you knowingly elected to not read the FAQ you were told to read wherein the rules were enclosed.
If you want to talk about abuse, remember that in real life, your rights can be taken away. Same goes for an online game. If you have the right to freedom, you still go to jail when breaking the law in real life, am I right? I thought so. The difference is that players have the choice of not logging in to FFL.
FFL has the best community I know, and it's because of the staff. In other games, with so little actually enforced, the communities spiral out of control to hell. FFL has a nice friendly community without controversial debates, flame wars, or otherwise trolling, and it's because the rules are enforced.
If a mod acts completely out of line and you have screenshots to prove it, then you can complain, sure, but even that's a slippery slope. First off, you should provide everything from the time you logged in, because some have tried to cut the parts of conversations that justified what the mods where saying, etc. (Take care when accusing Dolph. The guy isn't to be messed with. If you're being a moron, he'll tell you to your face, which has "offended" more than one rule breaker in the past.)
However, as Nielz has already stated, they do keep chat logs, they can check them, and in this case, Nielz himself said you're in the wrong.