Protecting my self hosted node from bad actors

let’s say I hate Sartaj.

if he shares a file on his self hosted node and I want to make his life a little hard.

if I start downloading files from his node and don’t upload any files myself and clear my cache so I don’t download from myself and other such actions so as to cause him maximum damage,

will his server/phone/computer slow down?

let’s say he does not have much bandwidth will his bandwidth deplete?