Then just don't get files from that certain group.
Kind of hard if they're the only ones subbing a given show... and if anything, raws are even more poorly hosted through DDL sources than subs. It's also more possible for a file hosted on a DDL service to expire through inactivity or get removed outright by Toei or other rights holders.
Once something is torrented it only takes one valid seed to make a file available again. Torrents are just better technology when it comes to distributing information and keeping the information out there. Torrenting is also at a point where you can use magnet links instead of trackers, which really makes the process no more dangerous than DDL in terms of divulging IP information.
If your ISP really wants to shut you down for piracy then they can easily do it through DDL. It is absolutely trivial for an ISP to monitor your bandwidth, deduce you are probably downloading encoded video from the filesize, and then work backwards to figure out which Rapidshare link you were downloading.
DDL is only "safer" for now because most ISPs refuse to do this unless a rights holder is willing to file suit against them. Some ISPs frankly aren't willing to identify an IP with the name/address of a specific user unless a company is willing to file suit against them-- otherwise IP only discloses location and provider.
So it's not actually dangerous to let your IP be known on a tracker. It's dangerous to get Internet service through an ISP that will bend over and divulge all of your personal information every time a copyright holder shakes a lawyer in their face. If I was in Keith's shoes, I'd be switching ISPs right about now.