You completely ignored his request for evidence that proactive scammer tagging without absolute proof is a net negative.

Here's one example of a proactive tagging of a scam exchange that was not "objectively" a scam until today:

https://bitcointalk.org/index.php?action=trust;u=902367

We drove them off the forum months ago -- they left not because we are meanies, but because they are scammers.

Feel free to find a counter-example of a negative feedback I left on an account that was undeserved. Don't just say, "but others do" -- I can't control what they do, and that's besides the point. The argument you are making is that tagging accounts with objective proof that they are scammers is inherently bad, and we are arguing otherwise.