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: 5/14/2014 05:41:38