I'm not allowed to mention what subreddit it is per the rules of this subreddit. But I'm sure you guys can guess which one it is. You see their comments about how much someone they knew with BPD hurt them. See them posting harsh judgment and cuss words towards other people who post on here. We are not your ex's. Not everyone here did or does the same things your ex that hurt you did. Not everyone here is dysfunctional or manipulative. Just because one BPD person did XYZ thing, doesn't mean everyone who has it, or even another person with BPD will do XYZ thing. 

The stigmatization and projection is not productive. Plus, posting aggressive comments to the OP's on here is not going to reverse the effect your ex had on you. They just use us to get validation/ revenge for themselves.