Patrick, actually his "case", as he described it, is not "tricky" at all.
Note this excerpt from The DreamHost Abuse Center, Under "Copyright Infringment, Our Rules":
(bolding is mine)
"Bringing it up to support" is something that the OP is always welcome to do, but DreamHost has made it very clear how they view the kind of situation he describes.
This is pretty much the standard position that most reputable U.S. based web hosting companies take (depending, of course, on what one considers to be "reputable").