hmm well yeah.. proxys help.. just use a reasonable amount of proxys, ermm a nice shell account.. dynamic IP.. and most important of all.. SPEED.. you gotta finish ur job as fast as possible.. b4 the admin notices u or atleast b4 da admin locates u.. though if you are behind i router.. i suggest to clear the logs of your router after doing ur task then reconnect to the net to get a new IP Address.. though i think your ISP has logs on which account had that IP Address at that certain time. so yeah.. thats the ONLY obstacle i can see.. your ISP..