if the warez "industry" has your freehost as a perm target, you are fucked up. Several high speed lines will upload 100000s small fies and post the links to their warez boards where 100000s surfers read them per day. You'll see you giant server suffering and everytime they'll find a way to trick you. You gotta love this game.

Of course some of the big guys have found a way to deal with it, but dont expect sharing the knowledge. Is part of the survival tool a freehost owner needs.
