Yes don't put up an eBay sale with the word Zippo in it, unless it's a real Zippo lighter. For example you can't say "like a Zippo" or you will get nailed.

What's more surprising is that some of these companies are paying someone to surf around the web and look for copywrite infractions. I want that job.

"What do you do for a living?"

I read eBay ads for Zippo...