Maybe the Ferrari Intelligence Agency could hack Vettel's ECU and make the alternator go pop themselves, if it doesn't happen anyway.
The ECU essentially has an FIA 'rootkit' on it that filters all I/O operations. Just because the teams don't have two-way telemetry, doesn't mean the facility isn't there, and that the FIA can't use it. Presumably if they can get privileged access to the ECU over radio, then they can do whatever they want to it, e.g. tweak certain parameters outside the ranges allowed by the ECU programs, or replace them with malicious ones that run anyway because they're signed. They could easily blow someone's alternator up with that.