Because I deny the very implication that the net detriment is larger than the net gain, because of the points I have made above. As you have been arguing for this whole time, the burden of proof is on you, as the one making the claims, to prove that your claims are factual and not just your opinions. If red tagging scammers is indeed causing such overwhelming amounts of harm to the forum, then it should be trivial for you to "document it in an objective and observable way". I wonder why you refuse.