A chap I recently did some business with recently had this with a well known car company, in the end they could only prove a few hours solicitors costs in tracking him down (despite demanding 1000s in fee's and 1000s in damages), sending you a (copied from 100 other cases) letter, and was unable to prove any losses or damages, but the domains had never been parked or anything. In the end he transferred the domain and requested they send him a detailed invoice. They have yet to send the invoice, about 10 days later, but have accepted the transfer. So he's expecting a few hundred quids worth of invoice.
This prompted my recent question about returning TM names
