> Your police record, where you live, who you're married to, and whether or not you voted last election are publicly available.
This is highly country specific. For the marriage record, I checked the laws in Germany, and (except for your own records) you have to present a "legal interest", which seems to be stricter than a "legitimate interest" (i.e. probably you need the information to enforce your rights, not just because you want to do genealogy). I'm pretty sure the others would count as particularly sensitive personal data too.
In the UK, as far as I know of those only marriage records is open. Police records can be obtained by your employer, but even then most minor (sentence less than 4 years) offenses are eventually considered spent and not disclosed to most roles. The electoral role (addresses) is open by default, but you can opt-out (though can still be used for certain narrow purposes), and as far as I know there is no way to check if someone voted (I've never heard of it happening, and searching doesn't give any information about it)
This is highly country specific. For the marriage record, I checked the laws in Germany, and (except for your own records) you have to present a "legal interest", which seems to be stricter than a "legitimate interest" (i.e. probably you need the information to enforce your rights, not just because you want to do genealogy). I'm pretty sure the others would count as particularly sensitive personal data too.