I don't "hate" casino runners, but I'm certainly not fond of them. All of them are put on my blacklist for two days then I take them off. If I see them spamming again, I put them back on and I don't take them off, and you are one of those people.
I know you really don't care anymore, and that's fine by me. You play however you want. It's none of my concern, and now that you're on my blacklist, I really don't have to care about you anymore.
Casino runners are nothing more than flies. Annoying and always where you don't want them, but easily killed (or ignored, in this case). So, whatever, do what you want. But just think about how many blacklists you're getting on. You probably don't care, but remember that when you try to form a party or ask someone a question.
The truly hated people are those who are arrogant and think they solely own the game. Those that think they are playing alone and can play by their own rules, and get mad when they find out they must work together to get what they want, and thusly aren't willing to do so. Those that have no regard for the other players in the server and play for only themselves, using whatever dirty tactics they can think of. We have plenty of those kinds of people, some suspected "gil farmers," some not.
The truly hated people in this game are the same types of people who are hated in the real world: the ignorant and stupid.