Found some new inputs about privacy in "Das Privacy Handbuch" by Timo Volkov from nostr:nprofile1qqsvkfkqvl5f579wdz2z4jqke7rhq9f5ly5z75h8c9c7u6jv6rp3hngep9xkm. Sad is the part about privacy in cars. Yeah, we really need something like a open source car ;-)