I was sued for selling ebooks I'd bought with "Resell Rights" - that was when I was like 13 tho, so my parents had to pay $500 - a little more wiser now.
__________________ David Turnbull | My Blog
August Revenue: $720
I get threatened every once in a while, but no one is ever serious. The costs associated with a lawsuit are enough that I wouldn't be concerned with anyone short of a major corporation.
If someone does shell out the bucks to get on the docket, you'll get served and have plenty of time to work it out before it goes to judgement. It takes very little effort to threaten a lawsuit, but substantially more to initiate one. By then, most people will just get frustrated or bored.
Being a legitimate business owner and a responsible person goes a long way as well.