That wasn't against the rules for the longest time, and people abused the hell out of it. There were (and still are, sadly) subreddits devoted to digging up com

That wasn't against the rules for the longest time, and people abused the hell out of it. There were (and still are, sadly) subreddits devoted to digging up comments they disagreed with and downvoting them, shaming them, and sending them hate mail. But even on regular subreddits, there were problems with meta content causing drama and downvote brigades.