I am reasonably confident a large percentage of Tesla's antics are blatantly illegal, but Tesla owners are still too few for someone to have actually gotten fed up with them enough to start suing them.
Refusing to activate a car you have the legal title to in any scenario is almost certainly illegal, whether you "salvaged" it or not, for instance. Some of the ways they restrict your car they already sold you, the way they use your cars sensors to collect data for their use, even if those sensors are disabled for the owners' use (Autopilot not purchased), etc. are probably one good lawsuit away from being thrown out.