I see your point on it. But I think it will be more dangerous if you want it activated and it stay off, in Portugal we pay 3.8 for each 100M over our limit/month. The ipfilter messes with toomany things that this feature can't be included.
( My ISP has a limit of 1GB internacional traffic/month, but they have a promo that they call happy hour, they don't count any traffic from 4am-7am)
Currently what I do is:
I've 2 dirs, with dif setups, one without ipfilter and other that only allows Portuguese IP's.
At 4:05 am I kill my amule, and copy all ~/.aMule files to "nac" dir, and copy my other configuration that allows worldwide IP's from dir "int" to ~/.aMule.
At 6:55 am I kill my amule and, copy back my ipfilter and all files from "nac" dir back to ~/.aMule and start it.
This problably ain't the best way, it was just the way that I've founf to bypass the problem, yet there is a emule clone for windows that has a ipfilter on/off for each file, and a timer for ipfilter if you wish to disable it for a certain time, but then again I don't use windows.
Tó