Thank you very much. I appreciate it. As far as new NG words are added, it's working well. One problem may be, since spammers keep coming to almost same thread, some threads are filled with too many "ahaan" (It is obvious with pub/hneta/kageki/kageki2 boards. Extreme example - http://pele.bbspink.com/test/read.cgi/kageki2/1381921523/ ) Transparent deletion may be better than replacing it with "ahaan", if it is possible, I think.