Would I want the RIAA/MPAA to install rootkits in media files that are distributed to customers? Absolutely not.
Would I want the ability to install rootkits in engineering schematics and documentation that are never intended to be distributed outside of my organization and are only activated in cases where data theft has occurred? Absolutely.
I certainly have the right to disable my car remotely if it is stolen. I also have the right to lock the doors and take pictures of the assailant who stole it and send them to the police.
Wouldn't locking the doors effectively be kidnapping?
Especially as it is unlikely this would affect serious criminals: If tech like this becomes common, then nobody sane would open stolen files without ensuring it was done in a self-contained environment and with software that ought to be unable to execute any of this crap. It will be trivial to stop for all but people who are unaware.