I had a major ouchie with geodomains that had "realtor" in them a few years ago. Was canvassing realtors in the market which matched one of my domains, and any of them that were part of chains or had multi offices, I'd send them my whole list. One day one helpful concerned citizen notifed NAR about my flagrant trademark violation (which, in my defence, was the result of ignorance and poor research, not outright avarice) and ... well. Anyway, the results were pretty predictable. ~$2,200 flushed down the toilet on domains, but theoretically quite a bit more saved in legal fees.
Frank