this is not the recommended method, but it makes me feel good.
i send one reply (not a great idea) telling them to remove me. no swearing, just short and sweet. if i get another spam from the same place, i go to rotten.com and copy / paste the picture of a man with an axe in his head. this is better than attaching because they get no option with the copy / paste but to see the picture. i then include text telling them to remove me or the next picture will be worse...and i can find pictures that would make most people vomit
like i said, not the best method, but i like it