The problem is, there are some legitimate (and very nice) players who play both lottery games and normal games. Blacklisting the massive portion of the community the play lottery games/have played lottery games/will player more lottery games would not only be a waste of time and effort, but will also damage you Warlight experience and leave you with few games to join. Not to mention the near-impossibility of tracking down all the lottery players.
It's an idea, but I think making use of the hide lottery games toggle would be easier for you in the short run and the long run.
Of course you can do with your blacklist what you like - I'd just advise against it.
List of Lottery game starter & blacklist: 2014-05-14 05:41:38
I've actually seen great players like Ribena join lotteries. If good players do that it's most likely them trying to level up to be able to play ladder.
List of Lottery game starter & blacklist: 2014-05-14 21:15:29
Yes, I used to join lottos because I was bored, but I stopped! :) I saw Pulsey join because he wanted to change his name. I think checking the "hide lottery games" thing is enough.
List of Lottery game starter & blacklist: 2014-05-14 23:00:46