It won't help much, if they are running enough clones it'll stall most scripts anyway because the information cannot be processed quickly enough, especially for those, like me, who alter the appearance of events or those (not me) who have bitmap backgrounds.
Some networks, CR powered ones especially have a usermode to block CTCP and another to block DCC and another called /silence which blocks msg, notice and CTCP floods. All these work at server level which means no pressure is placed on your script and indeed you don't even download any of the flooders data.
Server side defence is always far better.
