They would report you and you would be turfed from eBay immediately.
There is a much easier solution...pull up the offending buyers profile, scream out at the top of your lungs every expletive you know, 5 minutes later you'll either feel great or embarrassed!
If that doesn't do it then open a window and shout "xxxxx is a (%^*%^#&#)^_$#!!!!!!!!!!!!!!!
Next, grab your kitty (or equivalent) hug tight and say "why can't buyers be as wonderful as you are".
Final step, indulge yourself with some chocolate! (don't share with kitty of course).

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.