This question already has an answer here:
I have been using Stack Overflow for 2 years and 9 months. I really like the way this site works. But I am totally amused by how someone else's wrong deeds cost me my hard-earned reputation points.
I many times check my reputation loss and find the message "-10 user was removed". Come on, why am I losing points for someone's wrongdoings? I just answered to help someone. I don't know personally whether he/she has the right intentions.
I have lost roughly 40-45 reputation points because of this. I have referred to all posts regarding this on Meta but didn't understand why this was required.
Is it time for policy change on Stack Exchange?