I know this thread is a few days old now, but I just saw it.
Mattel pulled this shit with me a few months ago over my site,
www.barely18barbie.com. They sent me a nice little e-mail informing me that if I didn't hand over the domain to them, along with a report of how much the site has made since it's been online, that they would sue the crap out of me. They gave me one week to hand over the domain and the earnings report.
I fucking ignored them.
One week later, they contacted me informing that my week was up and I had to hand over the domain and earnings report immediately.
I fucking ignored them again.
I haven't heard back since. That was four months ago now. I'm hoping they just forgot about it. I figured if I e-mailed them back it'd just keep them interested. Ignoring them seems to have worked... for now.