I generally tag people who are being shitty. It’s totally fine if they disagree with me about things, or downvote me or whatever. But if they just insult others, or openly lie/mislead, or yell at others without bringing an actual argument, then they start getting tags. After enough tags, they get blocked.
The good news is, you have no tags! :)
Not usually. I don’t typically look too much at the instances I’m interacting on to know if they care about reports or not.