Relying on your own experience to inform your own personal opinions is one thing. Expecting other people to be swayed by it is entirely another. Which is why it's not a very respected way to debate/discuss/argue.
I'm still waiting for a better argument than "I have a feeling it might be the case" for why anyone thinks parsers will cause any increase at all (let alone significant increase) in harassment, griefing, or just general rudeness.