What I've heard and what I've seen, there is one way to prevent these spammers. There should be more chat mods from different time zones, that are reliable. Example 2 from America, 2 from U.K and the list goes on. But still it isn't enough. There is no way to stop people spmming without harming other players. For example, an update that you can't type on every 10 seconds or something like that. There has always been spammers, just like autoers. Ignoring list is good, and so it is "report abuse" button. Sometimes there are more pmods, who can't kick spammers than cmods, who can kick. Lightning has been away so long, that more cmods have left from chat and there is more burden on other cmods. Just my thoughts..