If you are not damaging them hardly, they won't even bother to think about you.
If you have their TM in your domain, you can expect a C&D notice, then if you don't comply, they'll probably take the domain away from you, handed over by the ICANN.
Anyway, if you get on their radar, you'll be shut off. And you won't be worth a lawsuit.
But if it makes you sleep better, in these cases C&Ds are shoot and if you comply, taking down your site and maybe handing your domain over to them (if they require you to). So, comply and live free.