As far as I'm concerned a domain on the public market is legally available for purchase by the public. If they don't like it, they should have bought the domain themselves.
One important thing that hasn't come up at all is what exactly is the first word?
Is it a family name that is very specific (ie: Stoudemekellson) or is it a generic descriptive term that just so happens to be the family name (ie: Quality). If it's Stoudemekellson Mortgage, then you're probably pretty fucked. If it's QualityMortgage.info then you'd probably be safe enough to tell them to piss off.
Also, keep in mind, ICANN is a US based organization. They are bound by US trademarks and will likely support StoudemekellsonMortage.info as a trademarked name.
I like this.Tell them they can have SxxxxxxxMortgage.info for $2000 (less than legal action)
They say 'no'
Buy SxxxxxxxMortgagesucks.com and rank it.
Tell them they can have both for $15000
i just threw an email back at them saying pay me for it (in fancy legal wording). Lets see how good I am at blagging!
if that fails, i'll just give it to them anyway. you're right its not worth the fight.