Suggestion: add a plugin to censor out and bad language in chat. 1. Saves staff time 2. Catches more bad words than staff do (they catch most but they miss a bunch when chat is busy) http://www.spigotmc.org/resources/chatcontrol.271/ This plugin can also auto-ban anyone who pastes an IP in chat. It also might hopefully stop CAPS bypassers.
Chat filters have been suggested before and they have all been denied. Using "man power" to monitor chat is easier to keep track of warnings, and things like that. I cannot see this being implemented, although I like the idea of the plugin, Its probably not very effective on ECC.