The voyger mobile app allows you to tag users and see how many times you’ve upvoted abd downvoted them. If you have an idea you can suggest it as a feature on github. Outside of that you can only really block and report if their behaviour breaks the rules.
At the moment its up to the community at the moment to weed out those kinds of people.
andros_rex@lemmy.world 18 hours ago
It’s best to look out for their tactics rather than individuals. Nothing stops someone from making a new account once they get known to be a KF or /pol/ troll.