This question is inspired from the situation of the woman who asked "How to intentionally get denied entry to the US, without getting into trouble?". Some of the suggestions people gave her would have put her life and the life of some of her family in danger e.g. like simply saying no and staying in Spain.
My questions is: if certain people posed a threat to your life and/or freedom (and this was provable), could you ask your government to deny those people visas when they apply for them?
For situations like user11743's it would be ideal if, when the visas were denied, the undesired peoples could not trace the reason for denial back to you. I'm also asking for both cases: where you have citizenship of the country you're residing in and where you don't have citizenship.
Of course, the undesired peoples could find their way to you illegally but this would put one more obstacle in their way.
Many people each year flee their country because of the threat of a certain individual but I have never heard of a government denying that certain person from entering the persons country of refuge, so maybe it's not possible.
Is this kind of request possible in any country in the European Union?
Disclamer: I understand that once someone enters the country, you can ask the police for protection from that someone but it is up to them to decide if your life is in enough danger to warrant protection. I am just asking to see if there is something you can do to prevent them from entering the country.