I would think that residential proxying would be illegal already, as it is a network intrusion. The trick is chasing down the offenders, proving their actions did harm, and getting them to pay. None of those steps are easy, even if there are laws to assist. Otherwise, spam would be a solved problem.
Is it still an intrusion if the user accepted the shrinkwrap TOS of an app that trades them “free TV” in exchange for allowing that app to operate a proxy (via an “app monetization” SDK) on their network?