In the EU, eCall is mandatory and disabling it fails most roadworthiness checks and voids most insurance policies, so it doesn't help much.
Also, while the EU does (for now) have stronger privacy protections for citizens against corporate interests, the opposite is true in most EU countries for Government surveillance.
eCall has very strong privacy protections, see Article 6: https://eur-lex.europa.eu/eli/reg/2015/758/oj