I just had a horribly evil idea. Has anybody ever warp scrambed somebody (legally) in high-sec that can't kill them, then just left EVE on and made it so that person can't do anything until the server resets or they get help from others? I suddenly have the urge to do that...
As far as tanking 0.0 rats is concerned; you should know ahead of time what kind of damage rats in the area are doing, and fit modules to stack resists against that damage. Then the bigger concern is having enough DPS to take out the 1.8 mil. + rats. If you have a system to your self and are able to chain expensive spawns (leave 1 small ship up so the others respawn) you can easily make around 40 mil. per hour.